Short hibernation?

Or possibly hibernation interrupted. I was surprised that the Lesser Horseshoe Bat that frequents our shed was still apparently active in late November but then it disappeared in the last week of that month so I assumed it had gone off to find a hibernation spot. I was even more surprised to find it back on February 9th. It may be that it is hibernating somewhere deeper into the shed and has just reacted to some unseasonably warm weather this winter. It has rather interrupted my plan to clean out the shed. Photo is an old one as I don't want to disturb it unduly.