338 WHISKERED TERN. 



Other rarer birds of the Family Laridce : 

 BLACK TERN. 



STERNA NIGRA. 



* 



Genus STERNA. 



Fifty years ago the Black Tern bred in many of the 

 fen districts of Lincolnshire, Norfolk, and also at 

 Romney Marsh in Kent; now it is only a spring and 

 autumn visitor, principally to the southern and eastern 

 English counties. It is not a beach bird, but frequents 

 lakes and large ponds, in the reeds of which it builds 

 its nest. The eggs are generally three in number, vary- 

 ing very much in colour and markings. Greyish green 

 to brownish buff are the extreme colours of the ground 

 work, the eggs being spotted and blotched with dark 

 brown and underlying greyish markings. 



WHITE-WINGED BLACK TERN. 



STERNA LEUCOPTERA. 



Genus STERNA. 

 An accidental visitor. 



WHISKERED TERN. 



STERNA HYBRIDA. 

 Genus STERNA. 



Another marsh-breeding visitor; of rarer occurrence 

 than the last. 



