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THE LONG-TAILED, OR NORTHERN HARELD. 
Hardda glacialis. 
PLATE IX. 
Anas glacialis and liyemalis, Linn . — Ilarelda glacialis, Leach . — 
Long-tailed Duck, or Northern Hareld of British authors. 
In all the ducks we have examined, the complete 
plumage has been perfected by winter, acquiring as 
the season of incubation advanced a fuller develop- 
ment and additional brilliancy ; in the species now 
before us, however, we have almost an entire change, 
or in the breeding time a new dress is put on, much 
darker, and showing considerable analogy in its tints 
and markings to the changes incident to many of 
the grallatores. The figure on the plate will exhi- 
bit the winter dress and that of the young bird ; the 
breeding plumage will be immediately described. 
The long-tailed duck, like many of these birds we 
have now described, is also only a winter visitant 
to our shores, none having yet been known to remain 
and breed, even among the more northern islands. 
Around the southern half of England it is consi- 
dered as a rare bird, on the coasts a few instances 
are occasionally recorded of specimens being ob- 
tained ; as we approach the north and the Scottish 
