BRITISH BIRDS 



and other lands, they congregate in multitudes, nesting within the dark recesses 

 under loose rocks and stones, where they are safe from the depredations of foxes ; 

 they are also said to breed on very high cliffs. Only one egg is laid, which, 

 in ground-colour, is pale greenish-blue, sometimes dotted and streaked with 

 pale red. 



Birds in full summer plumage are seldom seen in the British Islands ; the 

 one represented in the plate was drawn from a specimen kindly lent to me by 

 Lt.-Commander Millais obtained in June 1881 in Monefeith Bay, Forfar. 



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