system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When bats fly together in the thousands (sometimes millions) - how does each bat know which echo is its own?
gpt
Usually that type of flight is done at dawn and dusk. Bats have very good eyesight contrary to popular belief and are flying using sight to see other bats and hearing other bats to determine distance between them. Their own call is drowned out and unimportant when they are flying that way. Echolocation is more important when they are hunting than when they are commuting.