The Glaucous Gull 



England. Its breeding range is circumpolar, its nearest 

 breeding-place to our shores being in Iceland. 



The mantle and wings are pearl-grey, with white tips to 

 the secondaries and outermost webs of the quills. Orbital 

 ring vermilion. Legs pink. Immature birds are whitish 

 uniformly and thickly mottled with ash grey. Length 

 .29 in. ; wing 18 in. 



THE ICELAND GULL 



Larus leucopterus, Faber 



This species is very closely allied in plumage and habits 

 to the preceding. It is a winter visitor to the shores of 

 Scotland, only coming south in severe weather. It breeds 

 on Jan Mayen Islands and Greenland, and is only a winter 

 visitor to the island wliose name it bears. 



Except in size it is almost a counterpart of the Glaucous 

 Gull, but the orbital rino- is flesh-coloured, and the \e^,s 

 yellowish. Length 22 in. ; wing 1 6 in. 



THE KITTIWAKE GULL 



Rissa tridactyla (Linnaeus) 



With the Kittiwake we come to a species of Gull which 

 differs in its general build from those we have hitherto 

 dealt with. It is rather shorter in the leg, which gives it a 



3^9 47 



