Tawny Owl (Strix aluco) Science Article 2 abstract The Tawny Owl’s territory occupancy was studied on twoplots in Eastern Latvia. By mapping Tawny Owl calling sites and by usingactivity stimulation, the spacing of pairs and solitary individuals was tracedover 6 years. The Tawny Owl population increased during the study. Ofdetected resident owls, 11% were single […]
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Wood quality and the Tawny Owl Strix aluco in different foresttypes of central Italy
Tawny Owl (Strix aluco) Science Article 3 abstract We correlated breeding density and proportion of wooded area per territory of Tawny Owl Strix aluco measured in four deciduous forest types with forest elevation and songbird abundance, both regarded as estimators of forest productivity. The proportion of wooded area was positively correlated to forest elevation, being […]
Wood quality and the Tawny Owl Strix aluco in different foresttypes of central Italy
Tawny Owl (Strix aluco) Science Article 4 abstract The population of Tawny Owls Strix aluco breeding in urban Rome, Italy, was studied from 1992 to 2001. Yearly density (range: 0.9-1.1 territories km-2) was rather stable compared with data from central Europe, likely due to mild weather conditions and abundant food supply. The rate of territory […]
Possible first record of double brooding in the tawny owl Strix aluco
Tawny Owl (Strix aluco) Science Article 1 abstract […].A Tawny Owl population in Bizkaia was monitored between 1992 and 2003, producing a description of its breeding ecology (Zuberogoitia & Campos, 1998; Zuberogoitia & Martinez, 2000; Zuberogoitia, 2002). During the course of the study, one possible case of a second brood was registered. 1,700 Tawny Owl […]
Analysis of genetic parentage in the tawny owl ( Strix aluco ) reveals extra-pair paternity is low
Tawny Owl (Strix aluco) Science Article 5 abstract We have investigated genetic parentage in a Swiss population of tawny owls (Strix aluco). To this end, we performed genetic analysis for six polymorphic loci of 49 avian microsatellite loci tested for cross-species amplification. We found one extra-pair young out of 137 (0.7%) nestlings in 37 families […]
Living at the limit: Ecology and behaviour of Tawny Owls Strix aluco in a northern edge population in central Norway.
Tawny Owl (Strix aluco) Science Article 6 abstract The Tawny Owl Strix aluco was studied at the northernmost limit of its geographical range (63degree20’N) in order to investigate how this extremely residential species has adapted to the marginal conditions of its northern outpost. The presence of nemoral forest vegetation was crucial for the occurrence of […]
Breeding of the tawny owl Strix aluco in Finland: responses of a southern colonist to the highly variable environment of the north
Tawny Owl (Strix aluco) Science Article 7 abstract Large-scale patterns and variations in the occurrence and breeding of the Tawny Owl Strix aluco in Finland was studied in relation to the availability of small voles and winter ing birds as well as to general weather conditions of the preceding winter. In 1986-2000, pronounced three-year cycles […]
Nest Site Habitat and Prey Use of aBreeding Pair of Great Gray Owls in theUpper Peninsula of Michigan
Great Grey Owl (Strix nebulosa) Science Article 3 abstract We describe nest site habitat characteristics at two spatial scales and prey use forthe first confirmed successful nesting pair of Great Gray Owls (Strix nebulosa) inMichigan. Habitats around the nest site were considerably heterogeneous out to 2km, but relatively homogeneous at over 50 m. R. Gregory […]
Sex and Age Composition of Great Gray Owls
Great Grey Owl (Strix nebulosa) Science Article 2 abstract In the winter 1995/1996, a nearly continent-wide movementof Great Gray Owls (Strix nebulosa) occurred. A sample of 126 owlsexamined during this period, mainly from northeast of Winnipeg,included a large number from the 1994 hatch-year. Robert W. Nero and Herbert W.R. Copland, 2nd Owl Symposium Download article […]
NESTING CHRONOLOGY OF THE GREAT GRAY OWL AT AN ARTIFICIAL NEST SITE IN THE SIERRA NEVADA
Great Grey Owl (Strix nebulosa) Science Article 5 abstract The California Great Gray Owl (Strix nebulosa) population is centered in the Yosemite region of the Sierra Nevada (Winter 1980). Efforts were initiated in 1980 to enhance breeding habitat at Ackerson Meadow in the Stanislaus National Forest by providing artificial nests at 1400 m elevation, the […]