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183 relations: Adrenal gland, Albatross, Altricial, American avocet, American sparrow, Anatidae, Anatomical terms of location, Androgen, Anser (bird), Antigen, Attagis, Auk, Avian veterinarian, Barn swallow, Beak, Begging in animals, Billfish, Biological specificity, Bird, Bird anatomy, Bird of prey, Bird ringing, Bird vision, Black-headed gull, Blood vessel, Bone, Booby, Broiler, Brood parasite, Budgerigar, Calcification, Calipers, Cannibalism, Carotenoid, Cartilage, Castration, Cephalopod beak, Cetacea, Chicken, Chord (geometry), Claw, Coevolution, Colorfulness, Columbidae, Common cuckoo, Common loon, Common ostrich, Connective tissue, Cormorant, Corpuscles of Herbst, ..., Correlation and dependence, Corticosterone, Darter, Dermis, Dicynodont, Diet (nutrition), Digastric muscle, Diving duck, Ectoparasitic infestation, Egg, Elliott Coues, Emperor penguin, Empirical evidence, Emu, Epidermis (zoology), Estrildid finch, Eurasian scops owl, Falcon, Feather pecking, Fledge, Four-bar linkage, Friction, Frog, Frogmouth, Gannet, Garganey, Great curassow, Greater scaup, Grey jay, Handbook of the Birds of the World, Hemodynamics, Hodgson's hawk-cuckoo, Hormone, Hornbill, House sparrow, Hue, Huia, Hummingbird, Husk, Ibis, Immunocompetence, Indigo bunting, Insectivore, Integumentary system, Intraspecific competition, Keratin, King penguin, Kite (bird), Kiwi, Latin, Latitude, Lesser scaup, Malpighian layer, Mandarin duck, Mandible, Marbled murrelet, Mechanoreceptor, Megapode, Melanin, Mergus, Middle English, Mollusca, Montagu's harrier, Nasal cavity, Nasal septum, Nectar, Neuroma, Noisy miner, Nostril, Ornithischia, Ornithology, Owl, Pair bond, Parrot, Parrot crossbill, Passerine, Periosteum, Petal, Petrel, Pigment, PLOS One, Plumage, Poultry, Preening (bird), Procellariiformes, Puffin, Ratite, Raven, Red crossbill, Reptile, Rhinonyssidae, Ross's goose, Rostrum (anatomy), Salt marsh, Sandpiper, Scale (anatomy), Seed predation, Sexual dimorphism, Shield, Shrike, Sirenidae, Skull, Snail, Snout, Snow goose, Songbird, Southern cassowary, Speculum feathers, Stabilizing selection, Stork, Stress (biology), T cell, Tadpole, Tapaculo, Tawny frogmouth, Testosterone, Tetraodontidae, Three-dimensional space, Toco toucan, Tooth, Trabecula, Trichomonas gallinae, Tubercle, Turtle, Ultraviolet, Vent pecking, Viduidae, Vomer, Wavelength, Waxwing, Whiskers, William Shakespeare, Yellow-billed loon. Expand index (133 more) »
Adrenal gland
The adrenal glands (also known as suprarenal glands) are endocrine glands that produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol.
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Albatross
Albatrosses, of the biological family Diomedeidae, are large seabirds related to the procellariids, storm petrels and diving petrels in the order Procellariiformes (the tubenoses).
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Altricial
In biology, altricial species are those in which the young are incapable of moving around on their own soon after hatching or being born.
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American avocet
The American avocet (Recurvirostra americana) is a large wader in the avocet and stilt family, Recurvirostridae.
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American sparrow
American sparrows are a group of mainly New World passerine birds, forming part of the family Passerellidae.
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Anatidae
The Anatidae are the biological family of birds that includes ducks, geese, and swans.
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Anatomical terms of location
Standard anatomical terms of location deal unambiguously with the anatomy of animals, including humans.
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Androgen
An androgen (from Greek andr-, the stem of the word meaning "man") is any natural or synthetic steroid hormone which regulates the development and maintenance of male characteristics in vertebrates by binding to androgen receptors.
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Anser (bird)
The waterfowl genus Anser includes all grey geese (and sometimes the white geese).
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Antigen
In immunology, an antigen is a molecule capable of inducing an immune response (to produce an antibody) in the host organism.
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Attagis
Attagis is a genus of seedsnipe, a South American family of small gregarious waders which have adapted to a vegetarian diet.
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Auk
An auk or alcid is a bird of the family Alcidae in the order Charadriiformes.
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Avian veterinarian
An avian veterinarian is a veterinarian who specializes in treating birds.
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Barn swallow
The barn swallow (Hirundo rustica) is the most widespread species of swallow in the world.
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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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Begging in animals
Begging in animals is when an animal solicits being given resources by another animal.
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Billfish
The term billfish refers to a group of predatory fish characterised by prominent bills, or rostra, and by their large size; some are longer than 4 m (13 ft).
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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
Birds, also known as Aves, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
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Bird anatomy
Bird anatomy, or the physiological structure of birds' bodies, shows many unique adaptations, mostly aiding flight.
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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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Bird ringing
Bird ringing or bird banding is the attachment of a small, individually numbered metal or plastic tag to the leg or wing of a wild bird to enable individual identification.
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Bird vision
Vision is the most important sense for birds, since good eyesight is essential for safe flight, and this group has a number of adaptations which give visual acuity superior to that of other vertebrate groups; a pigeon has been described as "two eyes with wings".
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Black-headed gull
The black-headed gull (Chroicocephalus ridibundus) is a small gull that breeds in much of Europe and Asia, and also in coastal eastern Canada.
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Blood vessel
The blood vessels are the part of the circulatory system, and microcirculation, that transports blood throughout the human body.
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Bone
A bone is a rigid organ that constitutes part of the vertebrate skeleton.
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Booby
A booby is a seabird in the genus Sula, part of the Sulidae family.
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Broiler
A broiler (Gallus gallus domesticus) is any chicken that is bred and raised specifically for meat production.
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Brood parasite
Brood parasites are organisms that rely on others to raise their young.
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Budgerigar
The budgerigar (Melopsittacus undulatus), also known as the common parakeet or shell parakeet and usually informally nicknamed the budgie, is a small, long-tailed, seed-eating parrot.
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Calcification
Calcification is the accumulation of calcium salts in a body tissue.
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Calipers
A caliper (British spelling also calliper, or in plurale tantum sense a pair of calipers) is a device used to measure the distance between two opposite sides of an object.
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Cannibalism
Cannibalism is the act of one individual of a species consuming all or part of another individual of the same species as food.
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Carotenoid
Carotenoids, also called tetraterpenoids, are organic pigments that are produced by plants and algae, as well as several bacteria and fungi.
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Cartilage
Cartilage is a resilient and smooth elastic tissue, a rubber-like padding that covers and protects the ends of long bones at the joints, and is a structural component of the rib cage, the ear, the nose, the bronchial tubes, the intervertebral discs, and many other body components.
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Castration
Castration (also known as gonadectomy) is any action, surgical, chemical, or otherwise, by which an individual loses use of the testicles.
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Cephalopod beak
All extant cephalopods have a two-part beak, or rostrum, situated in the buccal mass and surrounded by the muscular head appendages.
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Cetacea
Cetacea are a widely distributed and diverse clade of aquatic mammals that today consists of the whales, dolphins, and porpoises.
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Chicken
The chicken (Gallus gallus domesticus) is a type of domesticated fowl, a subspecies of the red junglefowl.
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Chord (geometry)
A chord of a circle is a straight line segment whose endpoints both lie on the circle.
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Claw
A claw is a curved, pointed appendage, found at the end of a toe or finger in most amniotes (mammals, reptiles, birds).
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Coevolution
In biology, coevolution occurs when two or more species reciprocally affect each other's evolution.
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Colorfulness
Colorfulness, chroma and saturation are attributes of perceived color relating to chromatic intensity.
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Columbidae
Pigeons and doves constitute the animal family Columbidae and the order Columbiformes, which includes about 42 genera and 310 species.
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Common cuckoo
The common cuckoo (Cuculus canorus) is a member of the cuckoo order of birds, Cuculiformes, which includes the roadrunners, the anis and the coucals.
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Common loon
The common loon or great northern diver (Gavia immer) is a large member of the loon, or diver, family of birds.
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Common ostrich
The ostrich or common ostrich (Struthio camelus) is either of two species of large flightless birds native to Africa, the only living member(s) of the genus Struthio, which is in the ratite family.
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Connective tissue
Connective tissue (CT) is one of the four basic types of animal tissue, along with epithelial tissue, muscle tissue, and nervous tissue.
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Cormorant
Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags.
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Corpuscles of Herbst
The corpuscles of Herbst or Herbst corpuscles are nerve-endings similar to the Pacinian corpuscle, found in the mucous membrane of the tongue, in pits on the beak and in other parts of the bodies of birds.
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Correlation and dependence
In statistics, dependence or association is any statistical relationship, whether causal or not, between two random variables or bivariate data.
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Corticosterone
Corticosterone, also known as 17-deoxycortisol and 11β,21-dihydroxyprogesterone, is a 21-carbon steroid hormone of the corticosteroid type produced in the cortex of the adrenal glands.
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Darter
The darters or snakebirds are mainly tropical waterbirds in the family Anhingidae having a single genus Anhinga.
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Dermis
The dermis or corium is a layer of skin between the epidermis (with which it makes up the cutis) and subcutaneous tissues, that primarily consists of dense irregular connective tissue and cushions the body from stress and strain.
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Dicynodont
Dicynodontia is a taxon of anomodont therapsids or synapsids with beginnings in the mid-Permian, which were dominant in the Late Permian and continued throughout the Triassic, with a few possibly surviving into the Early Cretaceous.
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Diet (nutrition)
In nutrition, diet is the sum of food consumed by a person or other organism.
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Digastric muscle
The digastric muscle (also digastricus) (named digastric as it has two 'bellies') is a small muscle located under the jaw.
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Diving duck
The diving ducks, commonly called pochards or scaups, are a category of duck which feed by diving beneath the surface of the water.
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Ectoparasitic infestation
An ectoparasitic infestation is a parasitic disease caused by organisms that live primarily on the surface of the host.
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Egg
An egg is the organic vessel containing the zygote in which an animal embryo develops until it can survive on its own; at which point the animal hatches.
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Elliott Coues
Elliott Coues (September 9, 1842 – December 25, 1899) was an American army surgeon, historian, ornithologist and author.
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Emperor penguin
The emperor penguin (Aptenodytes forsteri) is the tallest and heaviest of all living penguin species and is endemic to Antarctica.
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Empirical evidence
Empirical evidence, also known as sensory experience, is the information received by means of the senses, particularly by observation and documentation of patterns and behavior through experimentation.
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Emu
The emu (Dromaius novaehollandiae) is the second-largest living bird by height, after its ratite relative, the ostrich.
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Epidermis (zoology)
In zoology, the epidermis is an epithelium (sheet of cells) that covers the body of an eumetazoan (animal more complex than a sponge).
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Estrildid finch
The estrildid finches are small passerine birds of the Old World tropics and Australasia.
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Eurasian scops owl
The Eurasian scops owl (Otus scops), also known as the European scops owl or just scops owl, is a small owl.
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Falcon
Falcons are birds of prey in the genus Falco, which includes about 40 species.
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Feather pecking
Feather pecking is a behavioural problem that occurs most frequently amongst domestic hens reared for egg production,Huber-Eicher, B. and Sebo, F. 2001.
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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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Four-bar linkage
A four-bar linkage, also called a four-bar, is the simplest movable closed chain linkage.
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Friction
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
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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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Frogmouth
The frogmouths are a group of nocturnal birds related to the nightjars.
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Gannet
Gannets are seabirds comprising the genus Morus, in the family Sulidae, closely related to boobies.
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Garganey
The garganey (Spatula querquedula) is a small dabbling duck.
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Great curassow
The great curassow (Crax rubra) (hocofaisán, pavón norteño) is a large, pheasant-like bird from the Neotropical rainforests, its range extending from eastern Mexico, through Central America to western Colombia and northwestern Ecuador.
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Greater scaup
The greater scaup (Aythya marila), just scaup in Europe or, colloquially, "bluebill" in North America, is a mid-sized diving duck, larger than the closely related lesser scaup.
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Grey jay
The grey jay (Perisoreus canadensis), also gray jay, Canada jay, or whisky jack, is a passerine bird of the family Corvidae.
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Handbook of the Birds of the World
The Handbook of the Birds of the World (HBW) is a multi-volume series produced by the Spanish publishing house Lynx Edicions in partnership with BirdLife International.
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Hemodynamics
Hemodynamics or hæmodynamics is the dynamics of blood flow.
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Hodgson's hawk-cuckoo
The Hodgson's hawk-cuckoo (Hierococcyx nisicolor), also known as the whistling hawk-cuckoo is a species of cuckoo found in north-eastern India, Myanmar, southern China and southeast Asia.
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Hormone
A hormone (from the Greek participle “ὁρμῶ”, "to set in motion, urge on") is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour.
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Hornbill
The hornbills (Bucerotidae) are a family of bird found in tropical and subtropical Africa, Asia and Melanesia.
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House sparrow
The house sparrow (Passer domesticus) is a bird of the sparrow family Passeridae, found in most parts of the world.
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Hue
Hue is one of the main properties (called color appearance parameters) of a color, defined technically (in the CIECAM02 model), as "the degree to which a stimulus can be described as similar to or different from stimuli that are described as red, green, blue, and yellow", (which in certain theories of color vision are called unique hues).
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Huia
The huia (Heteralocha acutirostris) is an extinct species of New Zealand wattlebird, endemic to the North Island of New Zealand.
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Hummingbird
Hummingbirds are birds from the Americas that constitute the family Trochilidae.
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Husk
Husk (or hull) in botany is the outer shell or coating of a seed.
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Ibis
The ibises (collective plural ibis; classical plurals ibides and ibes) are a group of long-legged wading birds in the family Threskiornithidae, that inhabit wetlands, forests and plains.
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Immunocompetence
Immunocompetence is the ability of the body to produce a normal immune response following exposure to an antigen.
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Indigo bunting
The indigo bunting (Passerina cyanea) is a small seed-eating bird in the cardinal family, Cardinalidae.
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Insectivore
robber fly eating a hoverfly An insectivore is a carnivorous plant or animal that eats insects.
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Integumentary system
The integumentary system comprises the skin and its appendages acting to protect the body from various kinds of damage, such as loss of water or abrasion from outside.
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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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Keratin
Keratin is one of a family of fibrous structural proteins.
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King penguin
The king penguin (Aptenodytes patagonicus) is a large species of penguin, second only to the emperor penguin in size.
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Kite (bird)
Kite is a common name for certain birds of prey in the family Accipitridae, particularly in subfamilies Milvinae, Elaninae, and Perninae.
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Kiwi
Kiwi or kiwis are flightless birds native to New Zealand, in the genus Apteryx and family Apterygidae.
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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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Latitude
In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface.
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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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Malpighian layer
The Malpighian layer of the skin is generally defined as both the stratum basale and stratum spinosum as a unit,McGrath, J.A.; Eady, R.A.; Pope, F.M. (2004).
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Mandarin duck
The mandarin duck (Aix galericulata) is a perching duck species found in East Asia.
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Mandible
The mandible, lower jaw or jawbone is the largest, strongest and lowest bone in the human face.
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Marbled murrelet
The marbled murrelet (Brachyramphus marmoratus) is a small seabird from the North Pacific.
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Mechanoreceptor
A mechanoreceptor is a sensory receptor that responds to mechanical pressure or distortion.
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Megapode
The megapodes, also known as incubator birds or mound-builders, are stocky, medium-large, chicken-like birds with small heads and large feet in the family Megapodiidae.
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Melanin
Melanin (from μέλας melas, "black, dark") is a broad term for a group of natural pigments found in most organisms.
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Mergus
Mergus is the genus of the typical mergansers, fish-eating ducks in the subfamily Anatinae.
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Middle English
Middle English (ME) is collectively the varieties of the English language spoken after the Norman Conquest (1066) until the late 15th century; scholarly opinion varies but the Oxford English Dictionary specifies the period of 1150 to 1500.
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Mollusca
Mollusca is a large phylum of invertebrate animals whose members are known as molluscs or mollusksThe formerly dominant spelling mollusk is still used in the U.S. — see the reasons given in Gary Rosenberg's.
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Montagu's harrier
The Montagu's harrier (Circus pygargus) is a migratory bird of prey of the harrier family.
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Nasal cavity
The nasal cavity (nasal fossa, or nasal passage) is a large air filled space above and behind the nose in the middle of the face.
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Nasal septum
The nasal septum separates the left and right airways in the nose, dividing the two nostrils.
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Nectar
Nectar is a sugar-rich liquid produced by plants in glands called nectaries, either within the flowers with which it attracts pollinating animals, or by extrafloral nectaries, which provide a nutrient source to animal mutualists, which in turn provide antiherbivore protection.
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Neuroma
A neuroma (plural: neuromata or neuromas) is a growth or tumor of nerve tissue.
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Noisy miner
The noisy miner (Manorina melanocephala) is a bird in the honeyeater family, Meliphagidae, and is endemic to eastern and south-eastern Australia.
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Nostril
A nostril (or naris, plural nares) is one of the two channels of the nose, from the point where they bifurcate to the external opening.
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Ornithischia
Ornithischia is an extinct clade of mainly herbivorous dinosaurs characterized by a pelvic structure similar to that of birds.
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Ornithology
Ornithology is a branch of zoology that concerns the study of birds.
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Owl
Owls are birds from the order Strigiformes, which includes about 200 species of mostly solitary and nocturnal birds of prey typified by an upright stance, a large, broad head, binocular vision, binaural hearing, sharp talons, and feathers adapted for silent flight.
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Pair bond
In biology, a pair bond is the strong affinity that develops in some species between a pair consisting of a male and female, or in some cases as a same-sex pairing, potentially leading to producing offspring and/or a lifelong bond.
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Parrot
Parrots, also known as psittacines, are birds of the roughly 393 species in 92 genera that make up the order Psittaciformes, found in most tropical and subtropical regions.
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Parrot crossbill
The parrot crossbill (Loxia pytyopsittacus) is a small passerine bird in the finch family Fringillidae.
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Passerine
A passerine is any bird of the order Passeriformes, which includes more than half of all bird species.
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Periosteum
The periosteum is a membrane that covers the outer surface of all bones, except at the joints of long bones.
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Petal
Petals are modified leaves that surround the reproductive parts of flowers.
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Petrel
Petrels are tube-nosed seabirds in the bird order Procellariiformes.
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Pigment
A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption.
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PLOS One
PLOS One (stylized PLOS ONE, and formerly PLoS ONE) is a peer-reviewed open access scientific journal published by the Public Library of Science (PLOS) since 2006.
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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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Poultry
Poultry are domesticated birds kept by humans for their eggs, their meat or their feathers.
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Preening (bird)
Preening is a maintenance behaviour found in birds that involves the use of the bill to position feathers, interlock feather barbules that have become separated, clean plumage, and keep ectoparasites under check.
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Procellariiformes
Procellariiformes is an order of seabirds that comprises four families: the albatrosses, petrels and shearwaters, and 2 families of storm petrels.
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Puffin
Puffins are any of three small species of alcids (auks) in the bird genus Fratercula with a brightly coloured beak during the breeding season.
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Ratite
A ratite is any of a diverse group of flightless and mostly large and long-legged birds of the infraclass Palaeognathae.
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Raven
A raven is one of several larger-bodied species of the genus Corvus.
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Red crossbill
The red crossbill (Loxia curvirostra) is a small passerine bird in the finch family Fringillidae, also known as the common crossbill in Eurasia.
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Reptile
Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives.
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Rhinonyssidae
Rhinonyssidae is a family of mites in the order Mesostigmata.
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Ross's goose
Ross's goose (Anser rossii) is a North American species of goose.
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Rostrum (anatomy)
In anatomy, the term rostrum (from the Latin rostrum meaning beak) is used for a number of phylogenetically unrelated structures in different groups of animals.
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Salt marsh
A salt marsh or saltmarsh, also known as a coastal salt marsh or a tidal marsh, is a coastal ecosystem in the upper coastal intertidal zone between land and open saltwater or brackish water that is regularly flooded by the tides.
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Sandpiper
Sandpipers are a large family, Scolopacidae, of waders or shorebirds.
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Scale (anatomy)
In most biological nomenclature, a scale (Greek λεπίς lepis, Latin squama) is a small rigid plate that grows out of an animal's skin to provide protection.
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Seed predation
Seed predation, often referred to as granivory, is a type of plant-animal interaction in which granivores (seed predators) feed on the seeds of plants as a main or exclusive food source,Hulme, P.E. and Benkman, C.W. (2002) "Granivory", pp.
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Sexual dimorphism
Sexual dimorphism is the condition where the two sexes of the same species exhibit different characteristics beyond the differences in their sexual organs.
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Shield
A shield is a piece of personal armour held in the hand or mounted on the wrist or forearm.
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Shrike
Shrikes are carnivorous passerine birds of the family Laniidae.
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Sirenidae
Sirenidae, the sirens, are a family of aquatic salamanders.
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Skull
The skull is a bony structure that forms the head in vertebrates.
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Snail
Snail is a common name loosely applied to shelled gastropods.
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Snout
A snout is the protruding portion of an animal's face, consisting of its nose, mouth, and jaw.
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Snow goose
The snow goose (Anser caerulescens), consisting of both a white phase and blue phase (blue goose), is a North American species of goose commonly collectively referred to as "light geese".
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Songbird
A songbird is a bird belonging to the clade Passeri of the perching birds (Passeriformes).
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Southern cassowary
The southern cassowary (Casuarius casuarius) also known as double-wattled cassowary, Australian cassowary or two-wattled cassowary, is a large flightless black bird.
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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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Stabilizing selection
Stabilizing selection (not to be confused with negative or purifying selection) is a type of natural selection in which the population mean stabilizes on a particular non-extreme trait value.
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Stork
Storks are large, long-legged, long-necked wading birds with long, stout bills.
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Stress (biology)
Physiological or biological stress is an organism's response to a stressor such as an environmental condition.
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T cell
A T cell, or T lymphocyte, is a type of lymphocyte (a subtype of white blood cell) that plays a central role in cell-mediated immunity.
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Tadpole
A tadpole (also called a pollywog) is the larval stage in the life cycle of an amphibian, particularly that of a frog or toad.
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Tapaculo
The tapaculos (pronounced /tæpəˈku:ləʊ/) are a family, Rhinocryptidae, of small suboscine passerine birds, found mainly in South America and with the highest diversity in the Andean regions.
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Tawny frogmouth
The tawny frogmouth (Podargus strigoides) is a species of frogmouth native to and found throughout the Australian mainland and Tasmania.
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Testosterone
Testosterone is the primary male sex hormone and an anabolic steroid.
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Tetraodontidae
The Tetraodontidae are a family of primarily marine and estuarine fish of the order Tetraodontiformes.
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Three-dimensional space
Three-dimensional space (also: 3-space or, rarely, tri-dimensional space) is a geometric setting in which three values (called parameters) are required to determine the position of an element (i.e., point).
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Toco toucan
The toco toucan (Ramphastos toco), also known as the common toucan, giant toucan or simply toucan, is the largest and probably the best known species in the toucan family.
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Tooth
A tooth (plural teeth) is a hard, calcified structure found in the jaws (or mouths) of many vertebrates and used to break down food.
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Trabecula
A trabecula (plural trabeculae, from Latin for "small beam") is a small, often microscopic, tissue element in the form of a small beam, strut or rod that supports or anchors a framework of parts within a body or organ.
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Trichomonas gallinae
Trichomonas gallinae is a cosmopolitan parasite of pigeons and doves.
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Tubercle
In anatomy, a tubercle is any round nodule, small eminence, or warty outgrowth found on external or internal organs of a plant or an animal.
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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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Ultraviolet
Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.
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Vent pecking
Vent pecking is an abnormal behaviour of birds performed primarily by commercial egg-laying hens.
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Viduidae
The indigobirds and whydahs, together with the Cuckoo-finch make up the family Viduidae; they are small passerine birds native to Africa.
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Vomer
The vomer is one of the unpaired facial bones of the skull.
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Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
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Waxwing
The waxwings are passerine birds classified in the genus Bombycilla.
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Whiskers
Whiskers or vibrissae (singular: vibrissa) are a type of mammalian hair that are typically characterised, anatomically, by their large length, large and well-innervated hair follicle, and by having an identifiable representation in the somatosensory cortex of the brain.
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William Shakespeare
William Shakespeare (26 April 1564 (baptised)—23 April 1616) was an English poet, playwright and actor, widely regarded as both the greatest writer in the English language, and the world's pre-eminent dramatist.
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Yellow-billed loon
The yellow-billed loon (Gavia adamsii), also known as the white-billed diver, is the largest member of the loon or diver family.
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Redirects here:
Beaked, Beaks, Bill tip organ, Billing (birds), Bird's beak, Bird's mouth, Cere, Culmen (bird), Culmen ridge, Gape, Gape flange, Gnathotheca, Gonydeal angle, Gonydeal expansion, Gonydeal spot, Gonys, Nail (beak), Operculum (bird), Rhamphotheca, Rhinotheca, Rictal bristle, Tomia.
References
[1] https://en.wikipedia.org/wiki/Beak
