I went to Costa Rica on a solo trip a few years ago and stayed near Corcovado national park. Took a rainforest walk and our guide pointed out these giant leaves that looked as if they had been perforated and folded on a very specific line. It was the work of these bats, which bite two diagonal cuts in the shape of a V, causing the sides to fold down and form a tent. And then they just chill in there, like a makeshift cave.
