ae 311 LIST OF ILLUSTRATIONS, 
rio. PAGE 
22, Curved bill of female, straight bill of male Huia-bird . . 33 
23. Feathers from back of Snowflake, showing seasonal changes in 
form and color due to wearing off of tips. . 
%4. Eggs of (a) Spotted Sandpiper and (6) Catbird, to chow differ- 
= in size of eggs of precocial and altricial birds of same 
Gis dima. Se 
- 68 
. 7 
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