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185 relations: Agreement on the Conservation of African-Eurasian Migratory Waterbirds, Aleutian Islands, Allen's rule, Allopatric speciation, American black duck, Americas, Anas, Anatidae, Anatinae, Ancient Greek, Animal Diversity Web, Annual Review of Ecology, Evolution, and Systematics, Anseriformes, Apex predator, Aquila (genus), Asia, Aves in the 10th edition of Systema Naturae, Aviary, Bald eagle, Beak, Bergmann's rule, Bering Sea, Binomial nomenclature, Biodiversity, Biological specificity, Bird egg, Bird migration, Bird of prey, Bitter orange, Black redstart, Brewer's duck, Brood parasite, Caddisfly, Canadian Journal of Zoology, Canidae, Caribbean, Carl Linnaeus, Central America, Christian Ludwig Brehm, Chronospecies, Cinnamon teal, Cline (biology), Clutch (eggs), Common goldeneye, Conservation biology, Corvidae, Corvus, Courtyard, Crustacean, D-loop replication, ..., Demography of the Roman Empire, Doc (computing), Domestic duck, Domestication, Dragonfly, Duck, Echinochloa crus-galli, Egg incubation, Einar Lönnberg, Estuary, Eurasia, Europe, European herring gull, Evolution, Evolution (journal), Extinction, Falkland Islands, Felidae, Feral, Fitness (biology), Fledge, Flock (birds), Florida, Florida Fish and Wildlife Conservation Commission, Fossil, Frog, Gadwall, Gastropoda, Gene flow, Genetic pollution, Genome, Genus, Global warming, Golden eagle, Goose, Greenland, Grey heron, Grey wagtail, Habitat, Hanging (meat), Haplotype, Hawaiian duck, Hawaiian Islands, Hybrid (biology), Ice age, Ig Nobel Prize, Imprinting (psychology), Incubation period, Indian spot-billed duck, Indo-Pacific, International Union for Conservation of Nature, Interspecific competition, Intraspecific competition, Introduced species, Invasive species, Invertebrate, IUCN Red List, Journal of Experimental Zoology, Journal of Wildlife Management, Late Pleistocene, Latin, Laysan, Laysan duck, Least-concern species, Lepidoptera, Lesser scaup, Malays (ethnic group), Meller's duck, Mexican duck, Mitochondrial DNA, Monogamy, Morphology (biology), Mottled duck, Muscovy duck, Mustelidae, Mute swan, Neolithic, Neolithic Greece, New World, North Africa, North America, Northern harrier, Northern Hemisphere, Northern Mexico, Northern pike, Northern pintail, Northern shoveler, Nutrient, Old French, Old High German, Old World, Opossum, Pacific black duck, Pacific Science, Peregrine falcon, Pleistocene, Plumage, Polygamy, Port wine, Precocial, Primorsky Krai, Raccoon, Red fox, Redhead (bird), Ruddy duck, Scandinavia, Sea eagle, Short-eared owl, Siberia, Skunk, Sociality, Southeast Asia, Southern Hemisphere, Southern United States, Speciation, Speculum feathers, Stanley Cramp, Subfamily, Subspecies, Swan, Systema Naturae, Tarsus (skeleton), The Auk, Tuber, Turtle, University of Michigan, University of Minnesota Press, University of Texas at Austin, Urbanization, Vulnerable species, Wels catfish, Wetland, Wildlife and Countryside Act 1981, Wing chord (biology), Yellow-billed duck. Expand index (135 more) »
Agreement on the Conservation of African-Eurasian Migratory Waterbirds
The Agreement on the Conservation of African-Eurasian Migratory Waterbirds, or African-Eurasian Waterbird Agreement (AEWA) is an independent international treaty developed under the auspices of the United Nations Environment Programme's Convention on Migratory Species.
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Aleutian Islands
The Aleutian Islands (Tanam Unangaa, literally "Land of the Aleuts", possibly from Chukchi aliat, "island") are a chain of 14 large volcanic islands and 55 smaller ones belonging to both the U.S. state of Alaska and the Russian federal subject of Kamchatka Krai.
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Allen's rule
Allen's rule is an ecogeographical rule formulated by Joel Asaph Allen in 1877, broadly stating that animals adapted to cold climates have shorter limbs and body appendages than animals adapted to warm climates.
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Allopatric speciation
Allopatric speciation (from the ancient Greek allos, meaning "other", and patris, meaning "fatherland"), also referred to as geographic speciation, vicariant speciation, or its earlier name, the dumbbell model, is a mode of speciation that occurs when biological populations of the same species become isolated from each other to an extent that prevents or interferes with genetic interchange.
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American black duck
The American black duck (Anas rubripes) is a large dabbling duck in the family Anatidae.
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Americas
The Americas (also collectively called America)"America." The Oxford Companion to the English Language.
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Anas
Anas is a genus of dabbling ducks.
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Anatidae
The Anatidae are the biological family of birds that includes ducks, geese, and swans.
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Anatinae
The Anatinae are a subfamily of the family Anatidae (swans, geese and ducks).
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Ancient Greek
The Ancient Greek language includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD.
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Animal Diversity Web
Animal Diversity Web (ADW) is an online database that collects the natural history, classification, species characteristics, conservation biology, and distribution information on thousands of species of animals.
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Annual Review of Ecology, Evolution, and Systematics
The Annual Review of Ecology, Evolution, and Systematics is an annual scientific journal published by Annual Reviews.
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Anseriformes
Anseriformes is an order of birds that comprise about 180 living species in three families: Anhimidae (the screamers), Anseranatidae (the magpie goose), and Anatidae, the largest family, which includes over 170 species of waterfowl, among them the ducks, geese, and swans.
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Apex predator
An apex predator, also known as an alpha predator or top predator, is a predator at the top of a food chain, with no natural predators.
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Aquila (genus)
Aquila is the genus of true eagles.
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Asia
Asia is Earth's largest and most populous continent, located primarily in the Eastern and Northern Hemispheres.
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Aves in the 10th edition of Systema Naturae
In the 10th edition of Systema Naturae published in 1758, the Swedish naturalist Carl Linnaeus described 554 species of bird and gave each a binomial name.
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Aviary
An aviary is a large enclosure for confining birds.
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Bald eagle
The bald eagle (Haliaeetus leucocephalus, from Greek ἅλς, hals "sea", αἰετός aietos "eagle", λευκός, leukos "white", κεφαλή, kephalē "head") is a bird of prey found in North America.
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Beak
The beak, bill, or rostrum is an external anatomical structure of birds that is used for eating and for preening, manipulating objects, killing prey, fighting, probing for food, courtship and feeding young.
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Bergmann's rule
Bergmann's rule is an ecogeographical rule that states that within a broadly distributed taxonomic clade, populations and species of larger size are found in colder environments, and species of smaller size are found in warmer regions.
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Bering Sea
The Bering Sea (r) is a marginal sea of the Pacific Ocean.
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Binomial nomenclature
Binomial nomenclature ("two-term naming system") also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages.
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Biodiversity
Biodiversity, a portmanteau of biological (life) and diversity, generally refers to the variety and variability of life on Earth.
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Biological specificity
In biology, biological specificity is the tendency of a characteristic such as a behavior or a biochemical variation to occur in a particular species.
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Bird egg
Bird eggs are laid by the females and incubated for a time that varies according to the species; a single young hatches from each egg.
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Bird migration
Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds.
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Bird of prey
A bird of prey, predatory bird, or raptor is any of several species of bird that hunts and feeds on rodents and other animals.
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Bitter orange
Bitter orange, Seville orange, sour orange, bigarade orange, or marmalade orange refers to a citrus tree (Citrus × aurantium) and its fruit.
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Black redstart
The black redstart (Phoenicurus ochruros) is a small passerine bird in the redstart genus Phoenicurus.
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Brewer's duck
The Brewer's duck is a hybrid between a mallard and a gadwall.
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Brood parasite
Brood parasites are organisms that rely on others to raise their young.
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Caddisfly
The caddisflies, or order Trichoptera, are a group of insects with aquatic larvae and terrestrial adults.
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Canadian Journal of Zoology
The Canadian Journal of Zoology is a peer-reviewed scientific journal that covers zoology.
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Canidae
The biological family Canidae (from Latin, canis, “dog”) is a lineage of carnivorans that includes domestic dogs, wolves, coyotes, foxes, jackals, dingoes, and many other extant and extinct dog-like mammals.
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Caribbean
The Caribbean is a region that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Sea and the North Atlantic Ocean) and the surrounding coasts.
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Carl Linnaeus
Carl Linnaeus (23 May 1707 – 10 January 1778), also known after his ennoblement as Carl von LinnéBlunt (2004), p. 171.
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Central America
Central America (América Central, Centroamérica) is the southernmost, isthmian portion of the North American continent, which connects with the South American continent on the southeast.
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Christian Ludwig Brehm
Christian Ludwig Brehm (24 January 1787 – 23 June 1864) was a German pastor and ornithologist.
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Chronospecies
A chronospecies is a species derived from a sequential development pattern which involves continual and uniform changes from an extinct ancestral form on an evolutionary scale.
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Cinnamon teal
The cinnamon teal (Spatula cyanoptera) is a species of duck found in western North and South America.
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Cline (biology)
In biology, a cline (from the Greek “klinein”, meaning “to lean”) is a measurable gradient in a single character (or biological trait) of a species across its geographical range.
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Clutch (eggs)
A clutch of eggs is the group of eggs produced by birds, amphibians, or reptiles, often at a single time, particularly those laid in a nest.
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Common goldeneye
The common goldeneye (Bucephala clangula) is a medium-sized sea duck of the genus Bucephala, the goldeneyes.
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Conservation biology
Conservation biology is the management of nature and of Earth's biodiversity with the aim of protecting species, their habitats, and ecosystems from excessive rates of extinction and the erosion of biotic interactions.
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Corvidae
Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, jackdaws, jays, magpies, treepies, choughs, and nutcrackers.
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Corvus
Corvus is a widely distributed genus of medium-sized to large birds in the family Corvidae.
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Courtyard
A courtyard or court is a circumscribed area, often surrounded by a building or complex, that is open to the sky.
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Crustacean
Crustaceans (Crustacea) form a large, diverse arthropod taxon which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill, woodlice, and barnacles.
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D-loop replication
D-loop replication is a proposed process by which circular DNA like chloroplasts and mitochondria replicate their genetic material.
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Demography of the Roman Empire
Demographically, the Roman Empire was an ordinary premodern state.
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Doc (computing)
In computing, DOC or doc (an abbreviation of "document") is a filename extension for word processing documents, most commonly in the proprietary Microsoft Word Binary File Format.
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Domestic duck
Domestic ducks are ducks that are raised for meat, eggs and down.
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Domestication
Domestication is a sustained multi-generational relationship in which one group of organisms assumes a significant degree of influence over the reproduction and care of another group to secure a more predictable supply of resources from that second group.
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Dragonfly
A dragonfly is an insect belonging to the order Odonata, infraorder Anisoptera (from Greek ἄνισος anisos, "uneven" and πτερόν pteron, "wing", because the hindwing is broader than the forewing).
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Duck
Duck is the common name for a large number of species in the waterfowl family Anatidae, which also includes swans and geese.
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Echinochloa crus-galli
Echinochloa crus-galli is a type of wild grass originating from tropical Asia that was formerly classified as a type of panicum grass.
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Egg incubation
Incubation refers to the process by which certain oviparous (egg-laying) animals hatch their eggs; it also refers to the development of the embryo within the egg.
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Einar Lönnberg
Axel Johann Einar Lönnberg (24 December 1865 – 21 November 1942) was a Swedish zoologist and conservationist.
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Estuary
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea.
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Eurasia
Eurasia is a combined continental landmass of Europe and Asia.
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Europe
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere.
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European herring gull
The European herring gull (Larus argentatus) is a large gull (up to long).
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Evolution
Evolution is change in the heritable characteristics of biological populations over successive generations.
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Evolution (journal)
Evolution, the International Journal of Organic Evolution, is a monthly scientific journal that publishes significant new results of empirical or theoretical investigations concerning facts, processes, mechanics, or concepts of evolutionary phenomena and events.
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Extinction
In biology, extinction is the termination of an organism or of a group of organisms (taxon), normally a species.
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Falkland Islands
The Falkland Islands (Islas Malvinas) is an archipelago in the South Atlantic Ocean on the Patagonian Shelf.
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Felidae
The biological family Felidae is a lineage of carnivorans colloquially referred to as cats.
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Feral
A feral animal or plant (from Latin fera, "a wild beast") is one that lives in the wild but is descended from domesticated individuals.
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Fitness (biology)
Fitness (often denoted w or ω in population genetics models) is the quantitative representation of natural and sexual selection within evolutionary biology.
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Fledge
Fledging is the stage in a volant animal's life between hatching or parturition and flight.
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Flock (birds)
A flock is a gathering of a group of same species animals in order to forage or travel with one another.
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Florida
Florida (Spanish for "land of flowers") is the southernmost contiguous state in the United States.
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Florida Fish and Wildlife Conservation Commission
The Florida Fish and Wildlife Conservation Commission (FWC) is a Florida government agency founded in 1999 and headquartered in Tallahassee.
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Fossil
A fossil (from Classical Latin fossilis; literally, "obtained by digging") is any preserved remains, impression, or trace of any once-living thing from a past geological age.
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Frog
A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (Ancient Greek ἀν-, without + οὐρά, tail).
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Gadwall
The gadwall (Mareca strepera) is a common and widespread dabbling duck in the family Anatidae.
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Gastropoda
The gastropods, more commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca, called Gastropoda.
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Gene flow
In population genetics, gene flow (also known as gene migration or allele flow) is the transfer of genetic variation from one population to another.
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Genetic pollution
Genetic pollution is a controversial term for uncontrolled gene flow into wild populations.
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Genome
In the fields of molecular biology and genetics, a genome is the genetic material of an organism.
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Genus
A genus (genera) is a taxonomic rank used in the biological classification of living and fossil organisms, as well as viruses, in biology.
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Global warming
Global warming, also referred to as climate change, is the observed century-scale rise in the average temperature of the Earth's climate system and its related effects.
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Golden eagle
The golden eagle (Aquila chrysaetos) is one of the best-known birds of prey in the Northern Hemisphere.
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Goose
Geese are waterfowl of the family Anatidae.
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Greenland
Greenland (Kalaallit Nunaat,; Grønland) is an autonomous constituent country within the Kingdom of Denmark between the Arctic and Atlantic Oceans, east of the Canadian Arctic Archipelago.
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Grey heron
The grey heron (Ardea cinerea) is a long-legged predatory wading bird of the heron family, Ardeidae, native throughout temperate Europe and Asia and also parts of Africa.
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Grey wagtail
The grey wagtail (Motacilla cinerea) is a member of the wagtail family, Motacillidae, measuring around 18–19 cm overall length.
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Habitat
In ecology, a habitat is the type of natural environment in which a particular species of organism lives.
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Hanging (meat)
Meat hanging is a culinary process, used in beef aging, that improves the flavor of meats by allowing the natural enzymes in the meat to break down the tissue through dry aging.
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Haplotype
A haplotype (haploid genotype) is a group of alleles in an organism that are inherited together from a single parent.
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Hawaiian duck
The Hawaiian duck (Anas wyvilliana) or koloa is a species of bird in the family Anatidae that is endemic to the large islands of Hawaiokinai.
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Hawaiian Islands
The Hawaiian Islands (Mokupuni o Hawai‘i) are an archipelago of eight major islands, several atolls, numerous smaller islets, and seamounts in the North Pacific Ocean, extending some from the island of Hawaiokinai in the south to northernmost Kure Atoll.
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Hybrid (biology)
In biology, a hybrid, or crossbreed, is the result of combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction.
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Ice age
An ice age is a period of long-term reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers.
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Ig Nobel Prize
The Ig Nobel Prize is a parody of the Nobel Prize, which is awarded every autumn to celebrate ten unusual or trivial achievements in scientific research.
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Imprinting (psychology)
In psychology and ethology, imprinting is any kind of phase-sensitive learning (learning occurring at a particular age or a particular life stage) that is rapid and apparently independent of the consequences of behaviour.
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Incubation period
Incubation period is the time elapsed between exposure to a pathogenic organism, a chemical, or radiation, and when symptoms and signs are first apparent.
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Indian spot-billed duck
The Indian spot-billed duck (Anas poecilorhyncha) is a large dabbling duck that is a non-migratory breeding duck throughout freshwater wetlands in the Indian subcontinent.
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Indo-Pacific
The Indo-Pacific, sometimes known as the Indo-West Pacific, is a biogeographic region of Earth's seas, comprising the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the seas connecting the two in the general area of Indonesia.
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International Union for Conservation of Nature
The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natural resources.
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Interspecific competition
Interspecific competition, in ecology, is a form of competition in which individuals of different species compete for the same resources in an ecosystem (e.g. food or living space).
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Intraspecific competition
Intraspecific competition is an interaction in population ecology, whereby members of the same species compete for limited resources.
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Introduced species
An introduced species (alien species, exotic species, non-indigenous species, or non-native species) is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental.
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Invasive species
An invasive species is a species that is not native to a specific location (an introduced species), and that has a tendency to spread to a degree believed to cause damage to the environment, human economy or human health.
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Invertebrate
Invertebrates are animals that neither possess nor develop a vertebral column (commonly known as a backbone or spine), derived from the notochord.
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IUCN Red List
The IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), founded in 1964, has evolved to become the world's most comprehensive inventory of the global conservation status of biological species.
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Journal of Experimental Zoology
Journal of Experimental Zoology is a peer-reviewed scientific journal of zoology established in 1904.
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Journal of Wildlife Management
The Journal of Wildlife Management is a peer-reviewed scientific journal devoted to the ecology of non-domesticated animal species.
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Late Pleistocene
The Late Pleistocene is a geochronological age of the Pleistocene Epoch and is associated with Upper Pleistocene or Tarantian stage Pleistocene series rocks.
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Latin
Latin (Latin: lingua latīna) is a classical language belonging to the Italic branch of the Indo-European languages.
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Laysan
Laysan (Hawaiian: Kauō), located northwest of Honolulu at N25° 42' 14" W171° 44' 04", is one of the Northwestern Hawaiian Islands.
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Laysan duck
The Laysan duck (Anas laysanensis), also known as the Laysan teal, is a dabbling duck endemic to the Hawaiian Islands.
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Least-concern species
A least concern (LC) species is a species which has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated but not qualified for any other category.
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Lepidoptera
Lepidoptera is an order of insects that includes butterflies and moths (both are called lepidopterans).
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Lesser scaup
The lesser scaup (Aythya affinis) is a small North American diving duck that migrates south as far as Central America in winter.
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Malays (ethnic group)
Malays (Orang Melayu, Jawi: أورڠ ملايو) are an Austronesian ethnic group that predominantly inhabit the Malay Peninsula, eastern Sumatra and coastal Borneo, as well as the smaller islands which lie between these locations — areas that are collectively known as the Malay world.
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Meller's duck
Meller's duck (Anas melleri) is a species of the dabbling duck genus Anas.
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Mexican duck
The Mexican duck (Anas diazi, and see below) is a dabbling duck in the genus Anas which breeds in Mexico and the southern United States.
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Mitochondrial DNA
Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, adenosine triphosphate (ATP).
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Monogamy
Monogamy is a form of relationship in which an individual has only one partner during their lifetime — alternately, only one partner at any one time (serial monogamy) — as compared to non-monogamy (e.g., polygamy or polyamory).
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Morphology (biology)
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features.
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Mottled duck
The mottled duck (Anas fulvigula) or mottled mallard is a medium-sized dabbling duck.
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Muscovy duck
The Muscovy duck (Cairina moschata) is a large duck native to Mexico, Central, and South America.
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Mustelidae
The Mustelidae (from Latin mustela, weasel) are a family of carnivorous mammals, including weasels, badgers, otters, martens, mink, and wolverines, among others.
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Mute swan
The mute swan (Cygnus olor) is a species of swan and a member of the waterfowl family Anatidae.
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Neolithic
The Neolithic was a period in the development of human technology, beginning about 10,200 BC, according to the ASPRO chronology, in some parts of Western Asia, and later in other parts of the world and ending between 4500 and 2000 BC.
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Neolithic Greece
Neolithic Greece is an archaeological term used to refer to the Neolithic phase of Greek history beginning with the spread of farming to Greece in 7000–6500 BC.
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New World
The New World is one of the names used for the majority of Earth's Western Hemisphere, specifically the Americas (including nearby islands such as those of the Caribbean and Bermuda).
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North Africa
North Africa is a collective term for a group of Mediterranean countries and territories situated in the northern-most region of the African continent.
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North America
North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere; it is also considered by some to be a northern subcontinent of the Americas.
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Northern harrier
The northern harrier or marsh hawk (Circus hudsonius or Circus cyaneus hudsonius) is a bird of prey.
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Northern Hemisphere
The Northern Hemisphere is the half of Earth that is north of the Equator.
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Northern Mexico
Northern Mexico (Spanish: el Norte de México), commonly referred as El Norte, is an informal term for the northern cultural and geographical area in Mexico.
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Northern pike
The northern pike (Esox lucius), known simply as a pike in Britain, Ireland, most of Canada, and most parts of the United States (once called luce when fully grown; also called jackfish or simply "northern" in the U.S. Upper Midwest and in Manitoba), is a species of carnivorous fish of the genus Esox (the pikes).
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Northern pintail
The pintail or northern pintail (Anas acuta) is a duck with wide geographic distribution that breeds in the northern areas of Europe, Asia and North America.
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Northern shoveler
The northern shoveler (Spatula clypeata), known simply in Britain as the shoveler, is a common and widespread duck.
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Nutrient
A nutrient is a substance used by an organism to survive, grow, and reproduce.
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Old French
Old French (franceis, françois, romanz; Modern French: ancien français) was the language spoken in Northern France from the 8th century to the 14th century.
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Old High German
Old High German (OHG, Althochdeutsch, German abbr. Ahd.) is the earliest stage of the German language, conventionally covering the period from around 700 to 1050.
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Old World
The term "Old World" is used in the West to refer to Africa, Asia and Europe (Afro-Eurasia or the World Island), regarded collectively as the part of the world known to its population before contact with the Americas and Oceania (the "New World").
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Opossum
The opossum is a marsupial of the order Didelphimorphia endemic to the Americas.
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Pacific black duck
The Pacific black duck (Anas superciliosa) is a dabbling duck found in much of Indonesia, New Guinea, Australia, New Zealand, and many islands in the southwestern Pacific, reaching to the Caroline Islands in the north and French Polynesia in the east.
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Pacific Science
Pacific Science is an international, multidisciplinary, academic journal devoted to the biological and physical sciences of the Pacific basin, focusing especially on biogeography, ecology, evolution, geology and volcanology, oceanography, palaeontology, and systematics.
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Peregrine falcon
The peregrine falcon (Falco peregrinus), also known as the peregrine, and historically as the duck hawk in North America, is a widespread bird of prey (raptor) in the family Falconidae.
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Pleistocene
The Pleistocene (often colloquially referred to as the Ice Age) is the geological epoch which lasted from about 2,588,000 to 11,700 years ago, spanning the world's most recent period of repeated glaciations.
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Plumage
Plumage ("feather") refers both to the layer of feathers that cover a bird and the pattern, colour, and arrangement of those feathers.
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Polygamy
Polygamy (from Late Greek πολυγαμία, polygamía, "state of marriage to many spouses") is the practice of marrying multiple spouses.
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Port wine
Port wine (also known as vinho do Porto,, Porto, and usually simply port) is a Portuguese fortified wine produced exclusively in the Douro Valley in the northern provinces of Portugal.
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Precocial
In biology, precocial species are those in which the young are relatively mature and mobile from the moment of birth or hatching.
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Primorsky Krai
Primorsky Krai (p; 프리모르스키 지방) is a federal subject (a krai) of Russia, located in the Far East region of the country and is a part of the Far Eastern Federal District.
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Raccoon
The raccoon (or, Procyon lotor), sometimes spelled racoon, also known as the common raccoon, North American raccoon, or northern raccoon, is a medium-sized mammal native to North America.
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Red fox
The red fox (Vulpes vulpes) is the largest of the true foxes and one of the most widely distributed members of the order Carnivora, being present across the entire Northern Hemisphere from the Arctic Circle to North Africa, North America and Eurasia.
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Redhead (bird)
The redhead (Aythya americana) is a medium-sized diving duck.
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Ruddy duck
The ruddy duck (Oxyura jamaicensis) is a duck from North America and one of the stiff-tailed ducks.
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Scandinavia
Scandinavia is a region in Northern Europe, with strong historical, cultural and linguistic ties.
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Sea eagle
A sea eagle (also called erne or ern, mostly in reference to the white-tailed eagle) is any of the birds of prey in the genus Haliaeetus in the bird of prey family Accipitridae.
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Short-eared owl
The short-eared owl (Asio flammeus) is a species of typical owl (family Strigidae).
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Siberia
Siberia (a) is an extensive geographical region, and by the broadest definition is also known as North Asia.
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Skunk
Skunks are North and South American mammals in the family Mephitidae.
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Sociality
Sociality is the degree to which individuals in an animal population tend to associate in social groups (Gregariousness) and form cooperative societies.
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Southeast Asia
Southeast Asia or Southeastern Asia is a subregion of Asia, consisting of the countries that are geographically south of China, east of India, west of New Guinea and north of Australia.
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Southern Hemisphere
The Southern Hemisphere is the half of Earth that is south of the Equator.
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Southern United States
The Southern United States, also known as the American South, Dixie, Dixieland, or simply the South, is a region of the United States of America.
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Speciation
Speciation is the evolutionary process by which populations evolve to become distinct species.
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Speculum feathers
The speculum is a patch, often distinctly coloured, on the secondary wing feathers, or remiges, of some birds.
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Stanley Cramp
Stanley Cramp (24 September 1913 – 20 August 1987) was a British civil servant and ornithologist best known as the first Chief Editor of the encyclopaedic nine-volume handbook The Birds of the Western Palearctic (BWP).
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Subfamily
In biological classification, a subfamily (Latin: subfamilia, plural subfamiliae) is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus.
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Subspecies
In biological classification, the term subspecies refers to a unity of populations of a species living in a subdivision of the species’s global range and varies from other populations of the same species by morphological characteristics.
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Swan
Swans are birds of the family Anatidae within the genus Cygnus.
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Systema Naturae
(originally in Latin written with the ligature æ) is one of the major works of the Swedish botanist, zoologist and physician Carl Linnaeus (1707–1778) and introduced the Linnaean taxonomy.
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Tarsus (skeleton)
The tarsus is a cluster of seven articulating bones in each foot situated between the lower end of tibia and fibula of the lower leg and the metatarsus.
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The Auk
The Auk: Ornithological Advances is a weekly peer-reviewed scientific journal and the official publication of the American Ornithological Society (AOS).
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Tuber
Tubers are enlarged structures in some plant species used as storage organs for nutrients.
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Turtle
Turtles are diapsids of the order Testudines (or Chelonii) characterized by a special bony or cartilaginous shell developed from their ribs and acting as a shield.
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University of Michigan
The University of Michigan (UM, U-M, U of M, or UMich), often simply referred to as Michigan, is a public research university in Ann Arbor, Michigan.
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University of Minnesota Press
The University of Minnesota Press is a university press that is part of the University of Minnesota.
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University of Texas at Austin
The University of Texas at Austin (UT, UT Austin, or Texas) is a public research university and the flagship institution of the University of Texas System.
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Urbanization
Urbanization refers to the population shift from rural to urban residency, the gradual increase in the proportion of people living in urban areas, and the ways in which each society adapts to this change.
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Vulnerable species
A vulnerable species is one which has been categorized by the International Union for Conservation of Nature as likely to become endangered unless the circumstances that are threatening its survival and reproduction improve.
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Wels catfish
The wels catfish (or; Silurus glanis), also called sheatfish, is a large species of catfish native to wide areas of central, southern, and eastern Europe, in the basins of the Baltic, Black, and Caspian Seas.
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Wetland
A wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem.
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Wildlife and Countryside Act 1981
The Wildlife and Countryside Act 1981 is an Act of Parliament in the United Kingdom implemented to comply with European Council Directive 2009/147/EC on the conservation of wild birds.
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Wing chord (biology)
Wing chord is an anatomical measurement of a bird's wing.
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Yellow-billed duck
The yellow-billed duck (Anas undulata) is a 51–58 cm long dabbling duck which is an abundant resident breeder in southern and eastern Africa.
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Redirects here:
Anas boschas, Anas platyrhynchos, Mallard Drake, Mallard Duck, Mallard duck, Mallard ducks, Mallards, Stock Duck, Wild Duck, Wild Ducks.
References
[1] https://en.wikipedia.org/wiki/Mallard
