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"Sterna anaisthetikos. Bridled Tern. The foot of a Bridled Tern; Tarsus .85; middle toe the same, with the claw 1.20; outer toe 1.00; inner .75." Elliot Coues, 1884

The Foot of a Bridled Foot

"Sterna anaisthetikos. Bridled Tern. The foot of a Bridled Tern; Tarsus .85; middle toe the same, with…

Side view of the Barn Swallow's claw. "Hirundo horreorum. Barn Swallow. Tarsi shorter than middle toe and claw, above feathered for a little distance; basal joint of middle toe partly adherent to both lateral toes." Elliot Coues, 1884

Barn Swallow Claw

Side view of the Barn Swallow's claw. "Hirundo horreorum. Barn Swallow. Tarsi shorter than middle toe…

"Cupidonia. Tarsi scant-feathered to the toes in front and on sides, bare on a strip behind; toes extensively webbed at base." Elliot Coues, 1884

The Foot of a Prairie Hen

"Cupidonia. Tarsi scant-feathered to the toes in front and on sides, bare on a strip behind; toes extensively…

"Squatarola. Four-toed Plover. A small but distinct hind toe, contrary to the rule in this family. Tail less than half as long as wing. Tarsus much longer than middle toe and claw. Tibia bare below, reticulate like the tarsus. Basal web between outer and middle toes. Upper plumage speckled, lower black or white; no rings or bars of color about head or neck. Legs dark-colored. Tail fully barred. Seasonal changes of plumage very; sexes alike." Elliot Coues, 1884

Four-toed Plover Bill and Hind Toe

"Squatarola. Four-toed Plover. A small but distinct hind toe, contrary to the rule in this family. Tail…

"Sterna fuliginosa. Sooty Tern. feet stout; toes short; with much incised webs; tibia bare .70; tarsus 1.00; middle toe and claw 1.20; outer do. 1.05; inner do. .75; hind do. .30. "Elliot Coues, 1884

Sooty Tern Foot

"Sterna fuliginosa. Sooty Tern. feet stout; toes short; with much incised webs; tibia bare .70; tarsus…

"...one or both webs may be so deeply incised, that is, cut away, that the palmation is practically reduced to semipalmation, as in terns of the genus Hydrochelidon." Elliot Coues, 1884

Incised Webbed Foot of a Tern

"...one or both webs may be so deeply incised, that is, cut away, that the palmation is practically…

"In the palmate or ordinary webbed foot, all the front toes are united by ample webs." Elliot Coues, 1884

Webbed Foot of a Tern

"In the palmate or ordinary webbed foot, all the front toes are united by ample webs." Elliot Coues,…