84 HOW TO NAME THE BIRDS 



20§. HERRING GULL. 



Pearly-blue White. 



22-27. Tips of wings, black. 



Abundant along coast and largest rivers ; rarely in Pa. ; in summer, 

 locally at large inland waters, particularly in Ad'r'ks ; nest, on 

 ground, coca, in tree ; eggs, 3, greenish-gray, spotted ; commonest 

 gull. 



209. BUFFLE-HEAD DUCK. 



Black, white White. 



14-16. Head, large and puffy, iridescent with purple and 

 violet ; large white patch on side of face ; mucli white on 

 wings ; locally abundant. 



t t Comprising those found regularly and not uncommonly on the 

 coast, and on larger waters of Fa. and N. J. in winter {ab- 

 breviated descriptiott). 



210. COMMON GANNET. 



31. Goose-shaped ; white, except black half of wings; 

 seldom on Jersey coast ; not in Pa . 



211. GREAT BLACK-BACKED GULL. 



31. Above, dark slate ; below ^ white ; rare in N. J . ; not 

 in Pa. 



212. GLAUCOUS GULL. 



30. Above, pale pearly -blue ; below^ white ; no black ; not 

 in Pa. nor N. J. 



213. RING-BILLED GULL. 



18-20. Black band around bill, near tip ; like herring- 

 gull (208), but noticeably smaller. 



