Much like the robin, the hedge accentor prefers to live in proximity with humans.

Hedge accentor

Much like the robin, the hedge accentor prefers to live in proximity with humans.

"A bird in the hand is worth two in the bush." Its better to have a small advantage rather than a greater one. -Trowbridge, 1866

Advantage Rebus

"A bird in the hand is worth two in the bush." Its better to have a small advantage rather than a greater…

"A grallatorial bird, a native of South America, often called the golden-breasted trumpeter."-Whitney, 1902

Agami

"A grallatorial bird, a native of South America, often called the golden-breasted trumpeter."-Whitney,…

"The Wandering Albatros of the Southern Oceans is white with narrow dusky undulations above and almost black wings." - A. H. Evens, 1900

Wandering Albatros

"The Wandering Albatros of the Southern Oceans is white with narrow dusky undulations above and almost…

Left wing of the albatross.

Left Wing of Albatross

Left wing of the albatross.

The wandering albatross (Diomedea exulans) is a seabird with the largest wingspan of any living bird.

Wandering Albatross

The wandering albatross (Diomedea exulans) is a seabird with the largest wingspan of any living bird.

A group of albatrosses, a family of natatores.

Albatrosses

A group of albatrosses, a family of natatores.

Native to South America, the tricolored alectrurus measures only six inches in length.

Tricolored Alectrurus

Native to South America, the tricolored alectrurus measures only six inches in length.

Birds usually have three cavities or stomachs. Labels: 1, The esophagus. 2, Ingluvies (crop). 2, Proventriculus (secreting stomach). 4. Triturating stomach (gizzard). 5, Intestine. 6, Two caeca.

The Alimentary Canal of a Fowl

Birds usually have three cavities or stomachs. Labels: 1, The esophagus. 2, Ingluvies (crop). 2, Proventriculus…

In reptiles the alimentary canal differs much from that of mammals or birds. As a general rule, it is shorter in proportion to the trunk than in warm-blooded vertebrates. Labels: 1, esophagus; 2, stomach; 3, small intestine; 4,large intestine.

The Alimentary Canal of the Flying Lizard

In reptiles the alimentary canal differs much from that of mammals or birds. As a general rule, it is…

Also known as the snake-bird, the anhinga inhabits the freshwater areas of the South Atlantic States; also in South America as far south as Brazil.

Anhinga

Also known as the snake-bird, the anhinga inhabits the freshwater areas of the South Atlantic States;…

The inner ear of a reptile (top), a bird (left) and an ox (right).

Animal Ears

The inner ear of a reptile (top), a bird (left) and an ox (right).

The Ferruginous Antbird (Drymophila ferruginea) is a bird in the Thamnophilidae family of antbirds. This species is also known by a former synonym: Ferruginous Ant-wren (Formicivora ferruginea).

Ferruginous Antbird

The Ferruginous Antbird (Drymophila ferruginea) is a bird in the Thamnophilidae family of antbirds.…

The Black-Faced Antthrush (Formicarius analis) is a bird in the Formicariidae family of ground antbirds. This species is also known by a former synonym: Mexican Ant-thrush (Formicarius moniliger).

Black-Faced Antthrush

The Black-Faced Antthrush (Formicarius analis) is a bird in the Formicariidae family of ground antbirds.…

"Apteryx is a genus of birds, the typical one of the family apterygidæ. Two species are known- the A. australis and A. mantelli, both from New Zealand. The natives call the former, and probably also the latter, Kiwikiwi, which is an imitation of their peculiar cry. The A. austalis is somewhat less in size than an ordinary goose. It runs when pursued, shelters itself in holes, and defends itself with its long bill; but unable as it is to fly, its fate, it is to be feared, will soon be that of the dodo- it is now almost extinct."—(Charles Leonard-Stuart, 1911)

Apteryx

"Apteryx is a genus of birds, the typical one of the family apterygidæ. Two species are known-…

A native of Brazil, Humboldt's araçarl averages approximately seventeen inches in length

Humboldt's AraƧarl

A native of Brazil, Humboldt's araçarl averages approximately seventeen inches in length

Archaeopteryx, sometimes referred to by its German name Urvogel ("original bird" or "first bird"), is the earliest and most primitive bird known. Archaeopteryx lived in the late Jurassic Period around 155–150 million years ago, in what is now southern Germany during a time when Europe was an archipelago of islands in a shallow warm tropical sea, much closer to the equator than it is now.

Archaeopteryx

Archaeopteryx, sometimes referred to by its German name Urvogel ("original bird" or "first bird"), is…

An illustration of the skeletal fossil of Archaeopteryx, the earliest and most primitive bird known. Archaeopteryx lived in the late Jurassic Period around 155–150 million years ago, in what is now southern Germany during a time when Europe was an archipelago of islands in a shallow warm tropical sea, much closer to the equator than it is now.

Archaeopteryx Fossil

An illustration of the skeletal fossil of Archaeopteryx, the earliest and most primitive bird known.…

An illustration of Penaud's artificial flying bird. "a b c d, a', b' c' d', lactic wings which twist and untwist when made to vibrate; a b, a' b', Anterior margins of wings; c d, c' d', Posterior margins of wings; c, c' Inner portions of wings attached to central of model by elastic bands at e' f, India-rubber in a state of torsion, which provides the motive power, by causing the crank situated between the vertical wing supports (g) to rotate; as the crank revolves the wing are made to vibrate by means of two rods which extend between the crank and the roots of the wings; h, tail of artificial bird." -Britannica, 1910

Penaud's Artificial Flying Bird

An illustration of Penaud's artificial flying bird. "a b c d, a', b' c' d', lactic wings which twist…

Athene maculta, which derive their name from the Greek goddess of wisdom, supposedly for their meditative air and mysterious habits. They are found throughout the world.

Athene Maculta

Athene maculta, which derive their name from the Greek goddess of wisdom, supposedly for their meditative…

A scene depicting a great auk, as well as razor-bills and puffins. The great auk is now extinct.

Great auk, razor-bills, and puffins

A scene depicting a great auk, as well as razor-bills and puffins. The great auk is now extinct.

"Crested Auklet (Simorhynchus cristatellus)."-Whitney, 1902.

Crested Auklet

"Crested Auklet (Simorhynchus cristatellus)."-Whitney, 1902.

The avocet averages about eighteen inches in length, feeding on worms, aquatic insects, and thin-skinned crustacea.

Avocet

The avocet averages about eighteen inches in length, feeding on worms, aquatic insects, and thin-skinned…

The Pied Avocet (Recurvirostra avosetta) is a large wader in the avocet and stilt family, Recurvirostridae (bill curved upwards).

Pied Avocet

The Pied Avocet (Recurvirostra avosetta) is a large wader in the avocet and stilt family, Recurvirostridae…

A bird just hatching from its egg with a butterfly flying near.

Baby Bird

A bird just hatching from its egg with a butterfly flying near.

An illustration of a baby in a basket with a crane standing over it.

Baby in Basket & Crane

An illustration of a baby in a basket with a crane standing over it.

About three feet, nine inches in height, the balœniceps is native along the banks of the White Nile, in East Africa.

Balœniceps

About three feet, nine inches in height, the balœniceps is native along the banks of the White…

Taking its name from the Azara people of South America, the batara is the largest of the shrikes.

Batara

Taking its name from the Azara people of South America, the batara is the largest of the shrikes.

The bill or nib of a bird, turtle, etc.

Beak

The bill or nib of a bird, turtle, etc.

Beak of Buzzard.

Buzzard Beak

Beak of Buzzard.

Beak of Hawfinch.

Hawfinch Beak

Beak of Hawfinch.

Beak of Hummingbird.

Hummingbird Beak

Beak of Hummingbird.

Beak of Tawny Owl.

Owl Beak

Beak of Tawny Owl.

Beak of Shrike.

Shrike Beak

Beak of Shrike.

Beak of Swift.

Swift Beak

Beak of Swift.

The namaqua bee-eater, native to Western Africa. Its diet consists of insects, particularly bees and wasps, hence its namesake.

Namaqua Bee-Eater

The namaqua bee-eater, native to Western Africa. Its diet consists of insects, particularly bees and…

Bill of Goat-sucker (Insect-eating bird).

Bill

Bill of Goat-sucker (Insect-eating bird).

The bill of the Gadwall Duck, showing the comb-like 'teeth' that they are known for.

Bill of Gadwall

The bill of the Gadwall Duck, showing the comb-like 'teeth' that they are known for.

External features of a bird.

Bird

External features of a bird.

Bird in the water

Bird

Bird in the water

A bird resting on the ground, near some bones.

Bird

A bird resting on the ground, near some bones.

A border of a bird.

Bird

A border of a bird.

An illustration of a bird.

Bird

An illustration of a bird.

An illustration of a bird and frog.

Bird & Frog

An illustration of a bird and frog.

An illustration of a bird perched on the side of a nest with eggs.

Bird and nest

An illustration of a bird perched on the side of a nest with eggs.

Arteries of the trunk of a bird. 1: The aorta. 2: The vena cava. 3: A cerebral artery. The small lines on each side represent the arteries and veins of the lungs.

Bird Arteries

Arteries of the trunk of a bird. 1: The aorta. 2: The vena cava. 3: A cerebral artery. The small lines…

A curved banner with a bird.

Bird Banner

A curved banner with a bird.

A bird doodad.

Bird doodad

A bird doodad.

An illustration of a bird eating crumbs.

Bird Eating Crumbs

An illustration of a bird eating crumbs.

A frame with many different species of birds.

Bird frame

A frame with many different species of birds.

An illustration of a sparrow proof bird house.

Bird House

An illustration of a sparrow proof bird house.

An illustration of a bird nest with an egg.

Bird Nest with an Egg

An illustration of a bird nest with an egg.

Birds-of-paradise are brilliantly colored, many having tufts or wires that float on the breezes.

Bird of Paradise

Birds-of-paradise are brilliantly colored, many having tufts or wires that float on the breezes.

Birds-of-paradise are brilliantly colored, many having tufts or wires that float on the breezes.

Bird of Paradise

Birds-of-paradise are brilliantly colored, many having tufts or wires that float on the breezes.

Birds-of-paradise are brilliantly colored, many having tufts or wires that float on the breezes.

Bird of Paradise

Birds-of-paradise are brilliantly colored, many having tufts or wires that float on the breezes.

A pair of birds of paradise, the emerald bird of paradise (above) and the superb bird of paradise (below).

Bird of Paradise

A pair of birds of paradise, the emerald bird of paradise (above) and the superb bird of paradise (below).

The Greater Bird of Paradise was once called as the Emerald Bird of Paradise because of the dark green color on its throat.

Greater Bird of Paradise

The Greater Bird of Paradise was once called as the Emerald Bird of Paradise because of the dark green…

Birds of Paradise are allied to the crows and found mainly in New Guinea. The king bird has beautiful plumage and is not only the most beautiful bird of this family but is also quite rare.

King Bird of Paradise

Birds of Paradise are allied to the crows and found mainly in New Guinea. The king bird has beautiful…

The Bird of Paradise is the common name of a family of birds, Paradiseide of ornithologists, found chiefly n New Guinea and neighboring islands, and remarkable for splendor of plumage.

The Bird of Paradise

The Bird of Paradise is the common name of a family of birds, Paradiseide of ornithologists, found chiefly…

The Twelve-Wired Bird of Paradise (Seleucidis melanoleucus) is a black and yellow bird of paradise named for its twelve wire-like feathers near its tail.

Twelve-Wired Bird of Paradise

The Twelve-Wired Bird of Paradise (Seleucidis melanoleucus) is a black and yellow bird of paradise named…