La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Home range size and habitat use of the Little Owl Athene noctua in East Poland
Auteurs :	Grzegorz Grzywaczewski, Auteur
Type de document :	Article
Dans :	Ardea (97(4) 2009)
Article en page(s) :	541-545
Résumé :	Home ranges of 11 Little Owls Athene noctua were studied using radio telemetry in agricultural landscapes of eastern Poland during the breeding seasons of 2000-03. Owls were tracked from the time of egg laying until the young dispersed (15 April - 22 August). Areas of use were determined for three periods: egg laying and incubation period (15 April - 17 May), nestling period (8 May 28 June), and fledgling period (29 June - 22 August). During the egg laying and incubation period use areas were on average 18 ha (SD 20, 2.5-65.3, n = 9), during the nestling period 27.5 ha (SD 28.2, 1.9-95.0, n = 18), during the fledgling period 9.0 ha (SD 9.4, 1.8-34.1, n = 11). Combining data for all owls from all breeding season periods, the area of use was 1.8-95.0 ha (average 19.9 ha, SD = 23.2, n = 38). The majority of owl locations were recorded in fields (64%, mainly cereals). Fewer locations were in fields with row crops (12%, sugar beets, potatoes), on buildings (11%), gardens and orchards (9%), meadows and pastures (2%), roads (1%) trees and bushes (1%). During the breeding season, the growth of vegetation limited the access that owls had to the ground. Little Owls spent 85-95% of their time at places where vegetation height did not exceed 20 cm.

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