SEA GBLLS 
Ss. different kinds of these birds are inhabitants 
of the British Islands, while eight or nine 
others are included in the list of “ occasional visitors.” Out 
of these, the best known of all is the Black-headed Gull, 
which is not only plentiful on almost all parts of our coasts, 
but also travels up most of our large rivers day after day, 
and is often to be seen seventy or eighty miles from the 
sea. It is a “ black-headed ” gull only during the breeding 
season, for at the approach of autumn the black, or rather the 
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