16 



14. Toes not as in preceding group. See 15. 



15. Hind claw not longer than the others; wings very long and gape very wide and 



deep; or else secondaries only six, and bill very long and slender. Tail- 

 feathers ten. Machrochires Goatsuckers, Swifts, and Hummingbirds. 

 15. Hind claw at least as long as the others; secondaries more than six, tail-feathers 

 12. Passeres Perching Birds: Flycatchers, Blackbirds, Jays, Orioles, 

 Sparrows, Finches, Swallows, Vireos, Warblers, Wrens, Thrushes, and most 

 other song-birds. 



