
ANSERIFORMES. bl 
Suborder 22. ANSERES. 
The Ducks, the Geese, and the Swans only require two characters for their diagnosis :— 
A. Basipterygoid processes articulating with the pterygoids as near the palatines as 
possible. B. Maxillo-palatines completely coalesced across the middle line. 
This diagnosis may be strengthened by the addition of many other characters :— 
C. Oil-gland tufted. D. Young born covered with down and able to run in a few. 














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The Swans appear to belong to a different family to the Ducks and Geese. The Cygnide 
have from 23 to 25 cervical (including ceryico-dorsal) vertebre, whilst the Anatide have 
only from 16 to 19. 
