Eric Medard / Whiskered Bat (Myotis mystacinus) in flight low over water, drinking in flight. France, Europe, July.

Ingo Arndt / Whiskered Bat (Myotis mystacinus) hibernating in cave covered with dew, Germany

Eric Medard / Whiskered Bat (Myotis mystacinus) in flight low above water, drinking in flight. France, Europe, August.

Eric Medard / Whiskered Bat (Myotis mystacinus) drinking from water in flight, with star-trails in night sky. France, Europe, August.

Eric Medard / Whiskered Bat (Myotis mystacinus) hibernating with dew on its fur. France, Europe, February.

Eric Medard / Whiskered Bat (Myotis mystacinus) hibernating with dew on its fur. France, Europe, February.

Dietmar Nill / Whiskered bat (Myotis mystacinus) hibernating, hairs covered in water droplets, Germany

Dietmar Nill / Whiskered bat (Myotis mystacinus) hibernating, hairs covered with frost, Germany.

Kim Taylor / Whiskered bat {Myotis mystacinus} hibernating in a damp cave, Europe.

Kim Taylor / Brown long-eared bat {Plecotus auritus} roosting beneath roof tiles, Europe.

Philippe Clement / Whiskered bat hibernating in cave {Myotis mystacinus} Belgium

Philippe Clement / Whiskered bat hibernating in cave {Myotis mystacinus} Belgium

Kim Taylor / Whiskered bat {Myotis mystacinus} hibernating in a cave, UK.

Hans Christoph Kappel / Whiskered Bat roosting, covered in dew. Germany