. A history of North American birds [microform] : land birds. Birds -- North America; Ornithology -- North American; Oiseaux -- Amérique du Nord; Ornithologie -- Amérique du Nord. Left foot of Chtftiira zonaris. Left foot of Panyptila melanoleuea. Cypselinae. Tarsi featlu'ivd ; phalanges of the middle and outer toes three each (instead of four and live). Iliml toe directed either forward or to one side, not backward. Tarsi leathered ; toes hare ; hind toe directe<l forward . . Cypselus. Both tarsi and toes feathered ; hind toe lateral .... Panyptila. Chaeturinse. Tarsi bare: phalanges of to
. A history of North American birds [microform] : land birds. Birds -- North America; Ornithology -- North American; Oiseaux -- Amérique du Nord; Ornithologie -- Amérique du Nord. Left foot of Chtftiira zonaris. Left foot of Panyptila melanoleuea. Cypselinae. Tarsi featlu'ivd ; phalanges of the middle and outer toes three each (instead of four and live). Iliml toe directed either forward or to one side, not backward. Tarsi leathered ; toes hare ; hind toe directe<l forward . . Cypselus. Both tarsi and toes feathered ; hind toe lateral .... Panyptila. Chaeturinse. Tarsi bare: phalanges of toes normal (four in middle toe, five in outer). Hind toe directed backwards, though sometimes versatile. Tarsi longer than middle toe. Tail-feathers spinous. Shafts of tail-feathers projecting beyond the plumage Shafts not jirojeeting, (Xephcecetes) Tail-feathers not spinous ...... Tarsi shorter than middle toe Chcetura. Ci/pseloiiles. CoUocaUia. DendrocheUdon. The Swifts are cosmopolite, occurring throughout the globe. All the genera enumerated above are well represented in the New World, except the last two, which are exclusively East Indian and Polynesian. Species of CoUovaUla make the " edible bird's-nests " which are so much sought after in China and Japan. Tliese are constructed entirely out of tlie hardened saliva of the bird, although formerly supposed to be made of some kind of sea-weed. All the Ci/pseli(f(r have the salivary glands highly developed, and use the secre- tion to cement together the twigs or other substances of which the nest is con- structed, as w^ell as to attach this to its support. The eggs are always white. There are many interesting peculiarities connected with the modification of the Ci/pselidcc, some of wiiich may be l)riefly adverted to. Those of our connnon Chinmey Swallow^ will be referred to in the proper place. Panyp- tila saiicti-hicronyma^ of Guatemala attaches a tul)e some feet in length to the under side of an overhanging rock,
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectbirdsnorthamerica
