Editing Bat detector (section)

====How it is used====
The operator guesses the likely species to be present and tunes the frequency accordingly. Many users will start listening around 45&nbsp;kHz. If a bat is seen or a bat-like call is heard, the frequency is tuned up and down until the clearest sound is heard.

Species like Pipistrelles which end their call with a "hockey stick" CF component can be recognised according to the lowest frequency which gives the clearest "plop" sound. Horseshoe bats give a peeping sound at a frequency depending on their species. FM calls all tend to sound like clicks, but the start and end frequencies and the call repetition pattern can give clues as to the species.