Wouldn't it be more likely that such hibernation (if real) was during the 8-10 coldest weeks of the year (Dec-Jan depending on location)? That would make it on

Wouldn't it be more likely that such hibernation (if real) was during the 8-10 coldest weeks of the year (Dec-Jan depending on location)? That would make it on the order of ~23kg which is a much more reasonable amount of fat to store. Six months seems like a very long time for anywhere south of the Arctic Circle.