BRITISH BIRDS. 
269 
date their hiftory. The finifhing hand of fome 
fcientific ornithologift is yet wanting^ whofe zeal 
and induftry in the purfuit may be rewarded by 
the means and opportunities of acquiring fuch in- 
formation as may clear up thofe doubts, and remove 
thofe difficulties, which have hitherto rendered this 
clafs of birds fo imperfe£tly known. 
The Lough-diver, the White Nun, and the Red- 
headed Smew feldom vifit this country, except in 
very fevere winters, by which they are driven from 
their haunts in the northern parts of the world. 
Their manners and habits are alike ; they alfo dif- 
fer little from the reft of the genus, which all live 
on fifh of various kinds, which they eagerly hunt 
after, both at fea and in the frefli-water lakes, as 
neceffity or inclination impels them to vifit the one 
or the other. 
