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 […]
Category: Strigiformes
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 […]
Diet of Finnish Snowy Owls Nyctea scandiaca
Snowy Owl (Nyctea scandiaca) Science Article 1 abstract The Snowy Owl has, during the last 70 years, bred in Finnish Lapland only in 1974, 1987, and 1988. We collected diet material directly from nest bowls, and from pellets found around the nests and at the resting sites of adults and young. These three parts may […]
DAILY TEMPERATURE CYCLES IN BARRED, GREAT-HORNED AND SNOWY OWLS
Snowy Owl (Nyctea scandiaca) Science Article 3 abstract This paper reports preliminary data on daily rhythmic fluctuations in skin and deep body temperatures of captive owls, and is a by-product of research aimed at the development of radio-telemetric techniques suitable for continuous, simultaneous monitoring of certain physiological and behavioral activities of unrestrained birds in the […]
First fossil record of the Snowy Owl Nyctea scandiaca (Linnaeus, 1758)(Aves: Strigidae) from Bulgaria
Snowy Owl (Nyctea scandiaca) Science Article 2 abstract The Snowy Owl is a resident species, spread in the Arctic zone. Sometimes itmakes irregular dispersial movements to the south. It inhabits the hilly tundraand rocky coasts. It nests on the ground. Separate individuals may reach the Temperate zone during their nomadic migrations (Harrison, 1982). Zlatozar BOEV, […]
Moonlight’s influence on predator/prey interactions between short-eared owls (Asio tlammeus) and deermice (Peromyscus maniculatus)
Short-eared Owl (Asio flammeus) Science Article 1 abstract This study examines the effect of moonlight intensity on deermouse (Peromyscus maniculatus) vulnerability to predation by short-eared owls (Asio flammeus). Three nocturnal light intensities, labeled new moon, quarter moon, and full moon, were simulated in a flight chamber. Deermouse activity was observed and measured by an index […]
Distribution, density, diet and productivity of the Scops Owl Otus scops in the Italian Alps
Scops-Owl (Otus scops) Science Article 1 abstract The Scops Owl Otus scops is probably the least known European owl. We surveyed Scops Owls in the Trento region (6200 km2) of the central-eastern Italian Alps between 1995 and 2003 and we intensively monitored a subpopulation in a 50-km2 plot between 2000 and 2003. In the whole […]
Use of recorder calls for detecting Long-eared Owls Asio Otus
Long-eared Owl (Asio otus) Science Article 1 abstract […].The aims of this study are (1) to determine if Long-eared Owls respond to broadcasts of conspecific calls, (2) to determine if the broadcast improved our ability to detect owls and (3) to discuss the behavioural response of owls. […]. Martinez, J. A., Zuberogoitia, I., Colas, J. […]
Use of recorder calls for detecting Long-eared Owls Asio Otus
Long-eared Owl (Asio otus) Science Article 1 abstract […].The aims of this study are (1) to determine if Long-eared Owls respond to broadcasts of conspecific calls, (2) to determine if the broadcast improved our ability to detect owls and (3) to discuss the behavioural response of owls. […]. Martinez, J. A., Zuberogoitia, I., Colas, J. […]
Effects of habitat loss on perceived and actual abundance of the Little Owl Athene noctua in eastern Spain.
Little Owl (Athene noctua) Science Article 1 abstract […]. The aims of this study are: (1) to reveal habitat-abundance relationship between the traditional agro-pastoral complex of the coast of Alicante and the Little Owl over a decade and (2) to test whether habitat loss can modify Little Owl detectability. […]. Martinez, J. A. & Zuberogoitia, […]