BTW, just because the animals are designed pirmarily for tundra swamp doesn't mean they don't occasionally wander into timbered regions, particularly along the Norwegian coast.
BTW- what makes you think Norway was always a timbered region?
What makes you think The arctic was always a cold and under ice? Geological evidence suggests otherwise, that in fact it was tropical.
I know it's easier to dismiss the discovery of mammoths, fox, rabbits, wolfs etc. the vegetation, the meat still hanging on these carcasses, seemingly instantly frozen with food in their mouths as being beamed to earth from another planet, but there IS an better, more sensible explanation for them.
Read this, then tell me what you think later, when you have read it all.
Berezovka Mammoth