13 



17 Upper tail-coverts. 



1 8 Tail feathers. 



19 First primary. 



20 Primaries. 



21 Tarsus. 



22 Hind toe. 



23 Outer toe. 



24 Middle toe. 



25 Inner toe. 



26 Abdomen or belly. 



27 Secondaries. 



28 Side. 



TYPES OF BILLS AND FEET 



39 Strongly hooked bill of hawk. 43 



40 Falcate bill of Mexican Crossbill. 44 



41 Tubular nostril of Fulmar Petrel. 45 



42 Raptorial foot of Long-eared 



Owl. 



Lobate foot of Pied-billed Grebe. 

 Palmate foot of duck. 

 Totipalmate foot of cormorant. 



Carpw 



diagram showing the various feather tracts on the wing of a bird 

 (from cory's birds of eastern north America) 



