LIST OF ILLUSTRATIONS. vii. 



Xest of Kestrel, showing Eggs embedded in remains page 

 of Pellets " 267 



Potatoes from Crop of Wood -Pigeon 268 



Attitudes assumed by the Common Gull in Courtship 

 (figs. 1, 2). {Photographed hy Miss Maud D. 

 Haviland.) — Plate 17 ... facing 277 



Attitudes assumed by the Common Gull in Courtship 



(fig. 3). {Photographed hy Miss Maud D. Haviland) 279 



The Bill and E^^es of Lesser Black-backed Gulls. 

 {Drawn hy E. Alexander and reproduced in 

 colour.) — Plate 18 ... ... preliminary to 305 



Key to Plate 18 ... ... ... preliminary to 305 



The Bill and Eyes of Great Black-backed Gulls. 

 {Drawn hy E. Alexander and reproduced in 

 colour.) — Plate 19 ... ... ... ... facing 305 



Lesser Black-backed Gull : Juvenile -plumage ... 308 



Lesser Black-backed Gull : First Summer-plumage 309 



Lesser Black-backed Gull: Second Summer-plumage 310 



Lesser Black-backed Gull : Third Winter-plumage 311 



Waxwings at Cambridge. (Photographed hy Miss 



E.L.Turner) 320 



