The mad bat woman has been at it again, wondering the streets at night, waving a badly tuned radio around. This time it was a small Devon village that looked on, bemused, at my antics.
Following my recent bat walk, where only common pipistrelles came out to play, I thought I might have better luck ticking off new species from my list away from home. So I jammed my bat detector and id chart into my bag, along with a change of clothes, and jumped on a train heading west.
I was fairly confident that I would see bats, and, after dusk I was proved right, spotting my first one just a few metres from the gate of where I was staying. This time the bat detector issued a slapping, clicking sound, different to a pipistrelle. Horay, a new species to tick off my list! But what was it? My BatLib app helped to narrow the options down to three, but I really couldn’t differentiate between them, even with the help of recordings, descriptions of flight patterns and habitats. So, once again, I have seen a new species, but don’t know what it is.
A few metres round the corner I picked up some more bats. The detector made the familiar babbling, squelching sounds of common pipistrelles, but this time at a higher frequency – it was a soprano pipistrelle. Horay, a new species that I can tick off my list!
With that, I decided to call it a night. I am going to need some expert help with identifying bats. Luckily I have another bat walk with experts booked. I hope that they don’t all go into hiding like last time!
Do you have any top tips for distinguishing between bat species, using a heterodyne detector?