Bats are a part of biodiversity
It's hard to believe that such biodiversity exists amidst all the hustle and bustle in and around Heidelberg Castle. In addition to European toads and grass frogs, Alpine newts and fire salamanders, bats are by far the most interesting, and simultaneously most feared, animal inhabitants. But there is no reason to fear these small, fascinating, flying mammals. In this region, they only feast on insects and are one of the more critically endangered species.