Mustela viscosa 6 July - wild release, when it takes over a lemming nest, forces the weasels to add to the nest. The captured behaviour also indicates that the wild animals may indeed drag dead lemmings into their nests themselves. So there is less prevalence that the lemming remains found in nests were, in fact, from animals which froze to death in the first instance. Some of these may have been killed by weasel depredation and then taken back into the lemming nest for consumption. Even so, I still hold that the available information, taken as a whole, indicates that most of the mortality resulted from freezing or other exposure and that the mean utilization by the weasels was a secondary result of this heavy, accidental mortality.