Kiwi, the little green parakeet (aka budgie), demonstrates how he’s learned to perfectly mimic the sound of a zipper being zipped whenever he hears the noise.
“Budgies are masters of mimicry. Not only do they imitate human voices, but they also imitate household sounds. For the first couple of years we had Kiwi, his cage was near a coat closet, so he heard coats zipping up every morning. It wasn’t until a couple years later that we realized the noise he was making was actually a zipper noise! Now, you can make a zipper noise and he will repeat it back.”