"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.…
"Figure shows Scutellate laminiplanter tarsus of a cat-bird. A tarsus so disposed as to its podotheca…
"Cat-Bird. Slate-gray, paler and more grayish-plumbeous below; crown of head, tail, bill, and feet black.…
Fringilla coelebs. Chaffinch. A small finch with edges of the tail being white, white bars on wings,…
"Bill shorter than head, slender, straight, depressed at base, compressed at end, notched. Wings long,…
"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;…
"Ripe chick's skull, longitudinal section, vied inside, x 3 diameters; after parker. In the mandible…
"Crown and nape, with chin and throat, black, separated by white sides of the head. Upper parts brownish-ash,…
"Upper part ashy-gray, with scarcely a shade, and only on the rump, under parts similarly grayish-white,…
"Pseudogryphus californianus. California Condor. Adult: Blackish, the feathers with browner tips or…
"Fulicia. Coot. Bill and frontal plate much as in the Gallinultes. Body depressed; the under plumage…
"Phalacrocorax bicristatus. Red-Faced Cormorant. Frontal feathers not reaching base of the culmen, the…
"Phalacrocorax bicristatus. Cormorant. The knee-joint of a Cormorants. F, femur; P, patella; T, tibia;…
"Phalacrocorax bicristatus. Red-Faced Cormorant. Skull showing sto, occipital style or nuchal bone;…
"Phalacrocorax bicristatus. Red-Faced Cormorant. Sternum and the shoulder from the skeleton of a Cormorant."…
"Phalacrocorax dilophus. Double-crested Cormorant. Tail of 12 feathers. Gular sac convex behind. No…
"Molothrus ater. Common Cowbird. Cuckold. male Adult: Lustrous green-black, with steel-blue, purple,…
"Coiling of the windpipe in the sternum of Grus canadensis. Sandhill Crane." Elliot Coues, 1884
"Very generally, in cranes and swans, the trachea enters the keel of the sternum, which is excavated…
"Black and White Creeper or Mniotilta varia. Black; edges of feathers of upper parts, coronal, superciliary,…
"Common Brown Creeper. Upper parts dark brown, changing to rusty-brown on the rump, everywhere streaked…
"Certhiola flaveola. Honey Creeper. Dark brown above; long superciliary line and under parts dull white;…
"Loxai curvirostra. American Red Crossbill. Red; wings and tail blackish, without white markings. Middle…
"Loxia leucoptera. White-winged Crossbill. Rosy-red, sometimes carmined or even crimsoned, obscured…
"Gymnocitta cyanocephala. Blue Crow. Male: Dull blue, very variable in intensity, nearly uniform, but…
"Geococcyx californianus. Ground Cuckoo. Chaparral Cock. Road Runner. Snake Killer. Paisano. Most of…
This Old World bird's plumage is gray or brown. They have a long tail, strong legs, and a slim body.
"Geococcyx californianus. Ground Cuckoo. Chaparral Cock. Road Runner. Snake Killer. Paisano. Most of…
"Coccygus americanus. Yellow-billed Cuckoo. Bill black, extensively yellow below and on the sides of…
"Coccygus americanus. Yellow-billed Cuckoo. Bill black, extensively yellow below and on the sides of…
"Numenius arquatus. Eurasian Curlew. European Curlew. Bill of very variably length, always longer than…
"Numenius hudsonicus. Hudsonian Curlew Jack Curlew. General tone of coloration scarcely rufous, the…
"Numenius longirostris. Long-billed Curlew. Sickle-bill. Plumage very similar to that of the Godwit,…
"Fig. 40 Phalanges of Cypseline foot, where the ratio is 2, 3, 3, 3 of Caprimulginae." Elliot Coues,…
"Fig. 24. - Pterylosis of Cyoselus apus, drawn by Coues after Nitzsch; right hand upper, left hand lower,…
"Adult, in summer: Slaty-plumbeous, paler below, inclining on the head to sooty-brown. Quills and tail-feathers…
"Bill shorter that head, slender and compressed throughout, higher that broad at the nostrils, about…
"Alle. Sea Dove. Size small. Bill very short, stout, and obtuse, as well as high at base, the sides…
"Starnaenas cyanocephala. Blue-headed Quail Dove. Crown rich blue bounded by black; a white stripe under…
"Zenaidura carolinensis. Carolina Dove. Mourning Dove. Wild Dove. Upper parts, including middle tail-feathers,…
Columba palumbus. European Ring Dove. Wood Pigeon. Plumage is gray with a pinkish-purplish breast and…
"Dafila. Pin-tail Ducks. Tail (in adult male) narrow, cuneate, when fully developed nearly as long as…
"Fig 27. - Bones of the right wing of a duck, Clangula islandica, A, shoulder, omos; B, elbow, ancon;…
"Camptolaemus labradorius. Labrador Duck. Pied Duck. Adult male: Bill black with orange at base and…
"Oidemia perspicillata. Surf Duck. Sea Coot. Adult male: Bill as above, singularly variegated in color,…
"Oidemia perspicillata trowbridgii. Trowbridge's Surf Duck, With the bill longer, exceeding the head,…
"Anus boscas. Mallard. Wild or Domestic Duck. Green-head. Bill greenish-yellow. Feet orange-red. Iris…
"Aix sponsa. Wood Duck. Summer Duck. "The Bride." Adult Male: Bill pinkish-white, with lake-red base,…
"Dafila acuta. Pin-tail Duck. Sprig-tail. Bill black, with grayish-blue edge of upper mandible; feet…
"Cochlea, X3. a, external, b, internal, cartilaginous prism; c, membranous zone; d, saccular extremity…
"Section of the cochlea, X3. a, vestibular surface of external cartilaginous prism, extending into d,…
"Membranous labyrinth of Haliaetus albicilla (White-tailed Eagle), X2. a,b, cochlea; b, its saccular…
"Part of the superior vertical semicircular canal, showing its ampulla (which is the dilatation of the…
"Membranous labyrinth of Haliaetus albicilla (White-tailed Eagle), X2. a,b, cochlea; b, its saccular…
"Haliaetus leucocephalus. White-headed Sea Eagle. "Bald Eagle." "Bird of Washington". Adult: Dark brown;…
"Fig. 6- scissors, knives, and forceps, 1/2 natural size." Elliot Coues, 1884 These items may be used…