Years ago, I visited two Vermont caves in winter to help biologists count hibernating bats. After descending through a hole into the first cave, I immediately noticed that it was much warmer than above ground. The cave was also more humid, and I could hear the steady drip of water.
We walked quietly into the darkness and shone our lights at the cave roof. Bats hung upside down singly and in clusters, wings wrapped around furry bodies and feet clinging to the ceiling. These bats would spend the entire winter immobile, except for brief periods of arousal, when they might change position in the cave. [Read more…] about Bats Prepare for Winter