Author/Editor		Vrezec, A
Title		Winter diet of one female Ural owl (Strix uralensis) at Ljubljansko barje (central Slovenia)
Type		članek
Source		Buteo Praha
Vol. and No.		Letnik 12
Publication year		2001
Volume		str. 71-6
Language		eng
Abstract		Winter diet of the Ural Owl (Strix uralensis macroura) was investigated at Ljubljansko barje in central Slovenia. Pellets were collected in the beginning of March 1997 near Ljubljana, not far from the forests where owls regularly breed. The average pellet size was 47 x 17 x 23 mm with 3.4 prey units and 86.8 g prey biomass per pellet. In the diet mammals dominate dwith 93.9 %, followed by insects (2.7 %), birds (1.6 %) and amphibians (1.6 %). The most frequent prey species were Microtus arvalis (17.2 %), M. agrestis (15.1 %), Neomys anomalus (12.4 %) and Micromys minutus (11.8 %). Remains of two Long-eared Owls (Asio otus) suggest the occurrence of interspecific competition between these two owl species during the winter.
Descriptors		BIRDS ECOSYSTEM ANIMAL NUTRITION SEASONS