97 
inhabits the same localities, and is even found 
in company with it on various parts of our coast, 
particularly in Wales. It has also been taken on 
the coasts of Yorkshire and Durham. In its habits 
and the choice of food, it is described as very 
closely resembling the species already named. It 
is reported to breed at Grimsey, in close proximity 
to the two former species. The eggs, which are said 
to resemble those of the Common Guillemot, being 
placed lower down the rocks, are more difficult to 
obtain. 
GULL, BLACK-HEADED. 
PeEewiT GuLuu. 
Larus Marinus, Lin. 
This species, which is very numerously dispersed 
along our shores, often congregates in estuaries and 
near the mouths of rivers during the cold season. 
They frequently make incursions inland, searching 
the pastures and ploughed fields for worms, &c., 
especially in stormy weather. In spring they 
betake themselves to particular marshes or lakes, 
on the tufts along the shores of which they form 
their nests, which are composed of rushes and 
sedges. The female lays two or three, sometimes 
four eggs of an olivaceous-green or light brown 
colour, spotted and blotched with brownish black 
and purplish grey, about two inches long and an 
inch and a quarter in breadth, 3 
H 
