Playback census of a breeding population of Little Owl, Athene noctua, in NW Lombardy (Varese province).

Submitted: 29 September 2014
Accepted: 29 September 2014
Published: 31 May 2012
Abstract Views: 559
PDF: 458
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In the years 2006-2008, the authors investigated a breeding population of Little Owl, Athene noctua, in an urbanized area of NW Lombardy (Varese province). They employed the playback method along 5 transects with 36 points of emission: they obtained an overall response rate of 33.6%, with a mean density of breeding pairs of 0.5/km2, a value close to the Italian mean value for urbanized areas. The authors found a significant value of the G test for the spacing of the breeding territories (G=0.73 and G=0.81 respectively) in the years 2007 and 2008. Otherwise no correlation was found with urbanized noise level and response rate, but in the three years 2006-2008 only 8 census points were continuously occupied vs. 16 points never occupied and 12 points revealed a positive response only in one year. The authors analyzed with ArcView 3.2 the available habitat between occupied and unoccupied points, but the 1:10.000 cartography was too coarse to reveal exactly the habitat use of Little Owl in the urbanized habitat.

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Colaone, S., Fanchin, B., Giusto, A., Guenzani, W., Saporetti, F., & Zarbo, T. (2012). Playback census of a breeding population of Little Owl, Athene noctua, in NW Lombardy (Varese province). Rivista Italiana Di Ornitologia, 80(2). https://doi.org/10.4081/rio.2010.94