If there were Bats in the bunker, surely there must have been other insects (prey / predators)? This is anecdotal, but a WW2 bomb shelter I saw was filled with

If there were Bats in the bunker, surely there must have been other insects (prey / predators)? This is anecdotal, but a WW2 bomb shelter I saw was filled with beetles and other creepy crawlies in Scotland. Ok it probably wasn't as deep underground as a nuclear storage facility but life finds a way.