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These include: (1) resident males, Echolocation calls of Nathusius’ pipistrelle are similar to those of the other pipistrelles. Minimum frequency: 39.2 kHz . 0.100 0.200 0.300 0.400 0.500 0.600 0.700 sec. You can see the ground reflection too. Unconfirmed but possible Nathusius's Pip. The social calls are between 20 to 30kHz, audible … The peak intensity of the call is lower than the other two species, however, at about 38kHz (between 36 and 40kHz). (1997), are listed below: Interpulse interval: 103.0 ms . In autumn and winter it migrates in a south-westerly direction (Strelkov, 1969) and returns during the late spring (Aellen, 1983). Facts compiled for BatLife Europe. A rule of thumb is that if the peak frequency is below 40KHz it might be a Nathusius , but might not be, and the social calls are even worse to disentangle. Roosts. A segment from 34:17 to 34:22 (eg see segment 200928_0125138 below) in the second recording appears to show some social calls ~30kHz and in bursts of about 3: The peak intensity of the call is lower than the other two species, however, at about 38kHz (between 36 and 40kHz). 30 kHz 60 kHz-90 dB -70 dB -50 dB -30 dB-10 dB Nathusius’ Pipistrelle are not the easiest bats to identify and we are grateful to Jon Russ for his help in confirming recordings. Echolocation calls of Nathusius’ pipistrelle are similar to those of the other pipistrelles. Up to 12 ms long QFC calls with peak frequencies of 38 – 43 kHz. soprano pipistrelle, the peak frequency at 55 kHz is shown by the darker colour on the sonogram in the lower window. See more below. Males establish mating territories along the migration routes Call duration: 7.7 ms . Spectrogram, FFT size 2048, Hanning window. Nathusius’ pipistrelle, Pipistrellus nathusii (Keyserling & Blasius 1839) is found from western Europe to Asia Minor (Corbet & Harris, 1991). Maximum frequency: 48.5 kHz A total of 151 recordings of call sequences of Pipistrellus nathusii (Nathusius' pipistrelle) were made during 20 nights over an entire autumn migration season (8 August – 30 November 2017). 45 recordings contained more than 10 calls. The peak frequency of their call is typically between 35 (30) and 40 (43) kHz, depending on the habitat and the presence of other individuals. I've never seen more than one natterers at a time. Mating behaviour The mating system of Nathusius’ pipistrelle is a dynamic system controlled by female choice and various behavioural strategies of males. PDF | Bat Species of the Year 2015: Nathusius' pipistrelle. calls; the peak frequency is down at nearly 40kHz, too low for common pips. I have number of these calls on record now, including one on emergence from a house roost. Habitat. 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