404 



BIRDS OF THE BRITISH ISLES. 



Sbearwater, 



THE Dusky Shearwater (Puffinus obscurus t Gmelin) is an 

 exceedingly rare abnormal spring migrant to the British 

 Islands, and inhabits the Tropic Seas. This Shearwater in 

 adult plumage closely resembles Puffinus anglorum in 

 colouration, but is less in size, and the upper parts are 

 darker. Length, about eleven inches. 



