He says that some people have reported bats attempting to hibernate in buildings in the Yukon, but does not think that these incidents really count. The bats could have been preparing to migrate and just stayed too late. He thinks that even that distance is exceptionally long. Nagorsen says that BC bats have not been reported hibernating further north than Prince George, but that could be because not much work has been done on bats in the North. He does not rule out the possibility that bats could winter in the North if they find an appropriate site, and says that identifying such sites is very important for bat conservation.
Bats are very vulnerable to disturbance while hibernating.
If they are aroused, they can use up their critical fat reserves and die. These winter roosts are called hibernacula, and in some places gates have been installed on the entrances to these sites to prevent people from disturbing the bats. But here in the North, we have to find these sites first.