. Handbook of birds of eastern North America; with introductory chapters on the study of birds in nature . Fia. 5t FiQ. 57. Order XVI. Machrochires.—Goatsuckers, Swifts, and obsolete group to which, for the present, the A. O. U. continuesto refer our American Goatsuckers, Swifts, and Hummingl)irds withmore obvious external characters as below. A. Size comparatively largo, plumage soft, variegated Ijlack, l)rown, and l)uff; middle-toc with a comblike edge (Fig. 55). . Family Caprimulgidce: Nighthawks, Whip-poor-wills, etc.,p. 331. B. Size medium, plumage close, firm, sooty black
. Handbook of birds of eastern North America; with introductory chapters on the study of birds in nature . Fia. 5t FiQ. 57. Order XVI. Machrochires.—Goatsuckers, Swifts, and obsolete group to which, for the present, the A. O. U. continuesto refer our American Goatsuckers, Swifts, and Hummingl)irds withmore obvious external characters as below. A. Size comparatively largo, plumage soft, variegated Ijlack, l)rown, and l)uff; middle-toc with a comblike edge (Fig. 55). . Family Caprimulgidce: Nighthawks, Whip-poor-wills, etc.,p. 331. B. Size medium, plumage close, firm, sooty black; tips of tail- feathers with spines (Fig. 56). . , Family Micropodidce:Swifts, p. 334. C. Size very small, upperparts shining green; bill long and slender (Fig. 57). . Family Trochilidcc: Hummingbirds, p. 335. 128 KEY TO FAMILIES. Order XVII. Passeres.—Perching Birds: Flycatchers,Blackbirds, Jays, Orioles, Sparrows, Finches,Swallows, Vireos, Warblers, Wrens, Thrushes, four, without webs, all on the same level; hind-toe as large as the middle one, its nail generallylonger than that of the middle one; tail of twelvefeathers. (Fig. 58.) [The following synopticaltable of the charactersof the twenty familieswhich we have in thisorder seems more satis-factory than an artifi-cial key.] Family 1. Tyrannidce.—Flycatchers (Fig. 59). Bill wider than high at the base,slightly hooked at the tip; base withconspicuous bristles; wings longer thanthe tail, the second to fourth prima-ries longest, the first but little shorterand generally equal to the fifth orsixth; back of tarsus rounded, likethe front; plumage generally olive-green or grayish; tail, except in theKingbird, without white spots, p. 338.
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