There was a full moonlight, and I could see that the noise was made by a great bat, which wheeled around, doubtless attracted by the light, although so dim, and every now and again struck the window with its wings.
– Bram Stoker
Dracula, Chapter 12. As he and the others watch over the ill Lucy, Dr. Seward heard a dull flapping or buffeting at the window. When he goes to take a loo, he sees that it is a large bat – it is Dracula!