from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun UK, Ireland A large member of the
diver family, Gavia immer, commonly breeding in North America, where it is known as the as common loon.
from Wiktionary, Creative Commons Attribution/Share-Alike License
From the fact that the species is a diver, the largest or greatest of those regularly found off the British Isles, which has a very northerly range (no further south than the British Isles).
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