y§ BRITISH BIRDS 



30 ounces to 3 pounds. The upper parts are bluish-grey> 

 except the primaries, which are black with white tips, and 

 the lower surface is white with a greyish tinge towards the 

 vent. The legs and feet are grey, and the bill is pale 

 vellow. 





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1 Jerking Gulls. 



Like the other Gulls this species is susceptible of being 

 tamed, and may. often be seen following the plough with 

 the Rooks. The young are mottled with brown and do 

 not reach maturity for two years. 



