When we were doing bat surveys most nights, after we caught the first few bats, we would watch later ones actively avoiding the mist nets we'd set up as the one

When we were doing bat surveys most nights, after we caught the first few bats, we would watch later ones actively avoiding the mist nets we'd set up as the ones we caught called both from the nets and from the bags we had them in. It was also known at the time we were doing our work bats communicate feeding areas to each other and are extremely vocal in their hibernacula and roosting sites.