"Diomedea brachyura. Short-tailed Albatross. Bill 5.00 or 6.00 inches long, with long, with moderately…
"Crotophaga ani. Smooth-billed Ani. Black Witch. Savanna Blackbird. Bill smooth or with a few transverse;…
"h, root of aorta; 1, arch of aorta, to the right side; li, left innominate; ri, innominate; ls, left…
"h, root of aorta; 1, arch of aorta, to the right side; li, left innominate; ri, innominate; ls, left…
"h, root of aorta; 1, arch of aorta, to the right side; li, left innominate; ri, innominate; ls, left…
"h, root of aorta; 1, arch of aorta, to the right side; li, left innominate; ri, innominate; ls, left…
"h, root of aorta; 1, arch of aorta, to the right side; li, left innominate; ri, innominate; ls, left…
"h, root of aorta; 1, arch of aorta, to the right side; li, left innominate; ri, innominate; ls, left…
"Simorhynchus pusillus. Least Auk. Knob-nosed Auk. Bill small and simple. but stout for its length,…
"Simorhynchus pusillus. Least Auk. Knob-nosed Auk. Bill small and simple. but stout for its length,…
"Ceratorhina monocerata. Unicorn Auk. Horn-bill Auk. Adults in summer: Bill orange-yellow. Culmen and…
"Ceratorhina monocerata. Unicorn Auk. Horn-bill Auk. In winter: Bill orange-yellow. Culmen and base…
"Alca Impennis. The Great Auk. A great white oval spot between eye and bill. Hood and mantle dark; under…
"Simorhynchus psittaculus. Parroquet Auk. Pug-nosed Auk. Adult in summer with the nasal saddle, moulted…
"Simorhynchus pygmaeus. Whiskered Auk. Red-nosed Auk. Bill (dry) orange-red, more salmon color or yellow…
"Ceratorhina monocerata. Unicorn Auk. Horn-bill Auk. Young: Bill like that of adults in winter, lacking…
"Simorhynchus pygmaeus. Whiskered Auk. Red-nosed Auk. Bill very small and weak, much compressed. No…
" A needle rock tenanted by Cormorants, Auks, etc." Elliot Coues, 1884 The rock is protruding from the…
"Simorhynchus pusillus. Least Auk. Knob-nosed Auk. Bill small and simple, but stout for its length,…
"Another small family, characterized by the extreme length of the slender legs, and the extreme slenderness…
"Speotyto. Burrowing Owls. tarsi long, about twice as long as the middle toe without its claw, very…
"Icterus. Orioles. Bill averaging as long as head (more or less); very acute, sometimes decurved." Elliot…
"North American White Pelican. Bill and feet ordinarily yellow; much reddened in the breeding season,…
"Birds of Prey" are birds who hunt for their food (other animals or meat) in flight. When they find…
"Botaurus. Bittern. Bill moderately longer than head, shorter than tarsus, which is shorter than middle…
"Botaurus. Bittern. Bill moderately longer than head, shorter than tarsus, which is shorter than middle…
"Botaurus mugitans. American Bittern. Indian Hen. Stake-driver. Bog-Bull. Plumage of the upper parts…
"Agelaeus phoeniceus. Blackbird. marsh Blackbird. Red-winged Blackbird. Red-and-buff-shouldered marsh…
"Xanthocephalus icterocephalus. Yellow-headed Blackbird. Male: Black, including lores and small space…
"in full plumage: Rich azure-blue, the ends of the wing-quills blackish; throat, breast, and sides of…
"Ortyx virginiana. Virginia Partridge or "Quail". Bobwhite. Male: Forehead, superciliary line, and throat,…
"Ortyx virginiana. Virginia Partridge or "Quail". Bobwhite. Male: Forehead, superciliary line, and throat,…
"Dolichonyx oryzivorus. Bobolink. Meadow-wink. Skunk Blackbird (Northern States), Reed-bird (Middle…
"Bernicla nigricans. Black Brant. Bill, feet, and claws black; iris brown. Head and neck all around,…
"Bernicla nigricans. Black Brant. Bill, feet, and claws black; iris brown. Head and neck all around,…
"Bernicla brenta. Brant Goose. Bill, feet, and claws black; iris brown. Head and neck all around, and…
"Sterna anaisthetikos. Bridled Tern. The foot of a Bridled Tern; Tarsus .85; middle toe the same, with…
"Clangula albeola. Buffle-head. Butter-ball. spirit-duck. Dipper. Bill with nostrils rather behind than…
"Pyrrhula cassini. Cassin's Bullfinch. Above, clear ashy-gray; below, cinnamon-gray; rump and under…
"Pooecetes gramineus. Grass Finch. Bay-winged Bunting. Vesper-bird. Above, grayish-brown, closely and…
"Spiza americana. Black Throated Bunting. Above, grayish-brown, the middle of the back streaked with…
"Calamospiza bicolor. Lark Bunting. White-winged Blackbird. Black, with A large white patch on the wings;…
"Plectrophanes nivalis. Snow Bunting. Snowflake. Pure white; the bill, feet, middle of back, scapulars,…
"Dull lead-color, frequently with a brownish or olivaceous shade, the top of the head abruptly darker…
"Lanius borealis. Great Northern Shrike. Butcher-bird. Great Grey Shrike. Above, clear bluish-ash, blanching…
"Lanius borealis. Great Northern Shrike. Butcher-bird. Great Grey Shrike. Above, clear bluish-ash, blanching…
"Archibuteo lagopus sancti-johannis. American Rough-legged Buzzard. "Black Hawk" Adult: Too variable…
"Buteo borealis. Red-tailed Buzzard. "Hen Hawk". Upper surface of tail rich chestnut, with white tip…
"Cathartes aura. Turkey Buzzard. Blackih-brown, grayer on the wing-coverts; quills black, ashy-gray…
"Fuligula vallisneria. Canvas-back. Adult male: The head close-feathered. Bill high at the base and…
"Fuligula vallisneria. Canvas-back. Adult male: The head close-feathered. Bill high at the base and…
"Fuligula vallisneria. Canvas-back. Adult male: The head close-feathered. Bill high at the base and…
"Polyborus auduboni. Common Caracara. General color blackish, the throat, neck all around, and more…
A Rose-breasted Grosbeak (lower) and a Northern Cardinal (upper) sit on branches among the flowers.…
"Cat-Bird. Slate-gray, paler and more grayish-plumbeous below; crown of head, tail, bill, and feet black.…
"Yellow-breasted Chat or Icteria virens. Bright olive-green, below golden-yellow, belly abruptly white;…
"Fig 66 - Head of a chick, second stage, after five days of incubation, section in profile; x6 diameters.…
"Skull of chick, third stage, viewed from below, x6 & 2/3 diameters. pn, prenasal cartilage, running…
"Skull of chick, second stage, in profile, brain and membranes removed to show cartilaginous formations,…
"Ripe chick's skull, longitudinal section, vied inside, x 3 diameters; after Parker. px, premaxillary;…