LARIDAE 



;09 



but all have red bill and feet. The colonies of our marsh- 

 breediug species supply large quantities of eggs for eating. 



Of the black-hooded, grey-mantled forms, which have as a 

 rule red bill and feet, L. atricAlla, the Laughing Gull, of the 

 Atlantic coast of l^orth America and AVestern Mexico, alone has 

 black oiiter primaries ; this species and. L. franklini, of the in- 

 terior of sub-Arctic America, having exceptionally dark mantles, 



Both migrate south in winter. 



and the latter pinkish under parts. 



Fig. 62. Great Black-headed Gull. Lanes ichthyaetus. 



Xt! 



T3- 



L. 'pliiladel'pliia , Bonaparte's Gull, of all North America, which, like 

 its two following congeners, strays to Britain, has the bill black ; 

 L. melanocephahis, of the Mediterranean and Black Seas, has a jet 

 black head, a partly red bill, and nearly white quills ; the very large 

 L. ichthyaetus ranging from the Black Sea and the Levant to Tibet, 

 and wintering in Southern Asia, has the bill almost orange. L. 

 scmndersi, a slender-legged stout-billed bird, inhabits the rivers 

 and coasts of China and Mongolia ; L. scrranus of the Andes 

 from Ecuador to Chili lieing a near ally. L. minutus, the Little 

 Gull, frequenting marshy districts in sub-Arctic and temperate 



