The weirdest I had was I kept hearing this scratching, thought it was mice in the wall, then narrowed it to mice trapped under the whirlpool tub, but couldn't pinpoint the noise. After much investigation I see little claws sticking out of the shower vent fan grate.Looked like a bird's foot. Unscrewed the vent/light cover and out falls a very tired and thirsty bat. Just lay in the shower lapping up water drops. I got it in a cup covered with a piece of cardboard and evicted it before full recovery.