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The common pipistrelle (Pipistrellus pipistrellus) is a small pipistrelle microbat whose very large range extends across most of Europe, North Africa, South Asia, and may extend into Korea. [2] It is one of the most common bat species in the British Isles. In Europe, the northernmost confirmed records are from southern Finland near 60°N. [3]
Bat detectors are the most common way to identify the species of flying bats. There are distinct types of call which can indicate the genus, and variations in pattern and frequency which indicate the species. For readers not familiar with the different types of bat detector, there is further information below and elsewhere.
Early radar ornithology mainly focused, due to limitations of the equipment, on the seasonality, timing, intensity, and direction of flocks of birds in migration. Modern weather radars can detect the wing area of the flying, the speed of flight, the frequency of wing beat, the direction, distance and altitude. [ 3 ]
Some early bat detectors used ex-Navy low frequency radio sets, simply replacing the aerial with a microphone and pre-amplifier. It is also possible to modify a portable Long Wave radio to be a bat detector by adjusting the tuning frequencies and replacing the ferrite rod aerial with a microphone and pre-amplifier.
As this species is often found at large water bodies, particularly during the autumn migration period, the survey involves surveying lakes twice during September, and making audio recordings from broadband bat detectors in order to verify Nathusius’ pipistrelle calls through sonogram analysis.
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The tricolored bat (Perimyotis subflavus) or American perimyotis [2] is a species of microbat native to eastern North America. Formerly known as the eastern pipistrelle, based on the incorrect belief that it was closely related to European Pipistrellus species, the closest known relative of the tricolored bat is now recognized as the canyon bat.
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