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82 Башта А.-Т. В.

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Інститут екології Карпат НАН України, Львів
e-mail: atbashta@gmail.com

Bashta A.-T.V.
Localization of hibernation sites and winter activity of Nyctalus noctula (Chiroptera) in urban
environment (Lviv)
Winter activity of N. noctula in the urban environment was investigated in the city of Lviv (Ukraine).
The studies were performed using an ultrasonic detector and visual observations. Totally 27 wintering
shelters were found, mostly located in narrow gaps between block houses (50%), as well as behind
decor slabs (4.1%), in wall cavities (4.1%), on balconies (12.5%). No preferences were found in the
altitudinal choice of shelter location and the house walls of a particular exhibition were not found/ A
positive correlation between the intensity of relative flight activity of bats and the average daily
temperature was revealed. No flight of bats was recorded below –4°C, although vocal activity in
shelters was recorded at outdoor temperatures of about –15°C. It is assumed that the choice of shelters
depends mainly on the general availability of shelter and their microclimatic characteristics. There is
a tendency to further shift the wintering zone of N. noctula in the northern direction and increase the
scale of its wintering in the urban landscape.
Key words: Noctule bat, wintering, adaptations, urban environment.