DUCK TOPOGRAPHY 



DUCK TOPOGRAPHY 



See Glossary for definitions of terms employed 



The terms used in describing the birds of this family are illustrated 

 in the following diagrams. Those readers who are not thoroughly fa- 

 miliar with ornithological expressions can readily become so by reading 

 carefully one or two of the "descriptions," referring at the same time 

 to this section, and to the Colour Plates of the birds being studied. 



Rump 



Upper Tail covert 



Hind Neck 

 Side of Neck 



2- 



-- 



Under Taircoverts 



FIG. 16. The topography of a duck 



Claw 



Web. 



Tarsus 



Nail 



Culmen 



Nostril 



Lower Mandible 



Lamellae 



FIG. 18. Typical bill 



