[Thinlómien]

But there's the Golf stream in North Europe which makes Scandinavia's climate inhabitable for humans. As far as I know, there's no such stream near Alaska.

I think that Beorn was something like Kodiac bear, too, because brown bears (which live in Finland) are relatively small for bears. But the quote said he ate no animals and fish are animals too, aren't they? So maybe he ate meat in bear form. Or then Tolkien just didn't use the word 'animal' for all animals but just for birds and mammals?

EDIT: I wouldn't maybe use the term 'wild animal' for a fish, though!