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[How is your day going?] 18th of August
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this post was submitted on 18 Aug 2023
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Day off today and soon heading out to a contemporary art exhibition in a nearby town with my SO - and to take a look around the town too, since we haven't been there for ages.
Then I'm out again this evening for a bat survey at a new nature reserve, recently acquired by the local Wildlife Trust.
What do you do in a bat survey?
With this one, we will be assigned a position somewhere likely to be attractive to bats on the site (I think that there will be 14 of us tonight, so 14 points) and then sit there with a bat detector for 90mins or so from around sunset.
You can simply position detectors and recorders alone, without people, but they are expensive and it is best to have someone with them - you also get to see the bats as they pass and can do some of the ID there and then.
These days we record the output from the detector for later analysis of the ultrasound and a lot of that can be done automatically, using AI, but humans still need to confirm the exact species. Once you have your ear in, though, you can recognise a lot of the calls (stepped down to the range that humans can hear) 'live' as you hear them, but a lot of the myotis family of bats are very similar and need further ID, through sonograms and actual visual ID, to be certain.
That sounds very interesting! What do you do with this information?
It will be passed to the wildlife trust so that they know what species they have on the site. This will allow them to manage the habitat in the most appropriate ways to benefit the bats - and other species that are present. It will also feed through to county and national records to monitor population trends and also potentially feed into any neighbouring planning applications - since bats are protected species in the UK.
Hey thanks for answering my questions! Your work sounds very interesting!