Ah, here we get it again--the claim that the wolves in the one small area of Alberta are FAR more bloodthirsty than the "original" wolves found in Montana--despite the fact that Lewis and Clark saw wolves preying constantly on bison, which apparently the transplants did not do in Yellowstone for many years--instead preferring elk. Eventually one pack learned to kill bison, but it took several years.
One basic biological fact is that large mammals tend to grow larger further north of the equator, until above the Arctic Circle,where the growing season is much shorter and food less available. This is Bergman's Rule, which not only applies to predators like wolves and grizzly bears, but prey animals such as elk, moose, deer, etc. It occurs because more body mass allows animals to stay warmer during longer, colder winters--and also occurs, for the same reason, at higher elevations further south. The larger average size of the Canadian wolves was not due to anything inherent in their "subspecies" (there is no difference in the DNA of the Canadian wolves) but their environment, just as "brown" bears are larger than inland grizzlies because of their seasonal salmon diet.
Beers was NOT the "head of USFWS," but Chief of National Wildlife Refuge Operations.
