This is good for detecting and identifying bats, but is rather messy to listen to so we have not included any. There recordings here are played back at one tenth of original speed, so each second takes 10 seconds to replay. Most of the time you hear normal navigational calls - nearly regular squeaks, in this case interspersed with a few at higher rate, presumable to identify and avoid some obstacle. If you are lucky you can catch an attack sequence as the bat locates a suitable flying insect, and homes in on it. It was made using the same settings as the above.
Some people think bats are ugly or grotesque.
Look at those facial features with the eye of an amazingly designed audio transmitter and analyser that can paint a picture of the world, and maybe your view will subtly alter. In the UK bats are heavily protected species in decline through loss of both natural roosting habitat such as undisturbed caves, and changes in housing design that make loft spaces unsuitable or inaccessible.