Tag: all of Bubo

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, […]

Possible first record of multiple brooding of the Eagle Owl Bubo bubo

Eurasian Eagle-Owl (Bubo bubo) Science Article 4 abstract […]. Since 1989, we have monitored the Eagle Owl population of the provinces of Alicante Rearing second broods is unlikely for large birds of prey because they lay few eggs, have low feeding rates and nestlings have a slow growth (Klomp, 1970; Newton, 1979). All of this […]

Use of farm chicken carcasses by the Eagle Owl Bubo bubo

Eurasian Eagle-Owl (Bubo bubo) Science Article 2 abstract The diet of the Eagle Owl Bubo bubo has been widely studied, showing the bird’s outstanding trophic eclecticism in the whole of its distribution range (see reviews by Mikkola, 1983; Cramp, 1985). However, the carrion-eating habits of Eagle Owls are little known. […] Serrano, D., Ardeola 47(1), […]

Reproductive success of a reintroduced population of Eagle Owls Bubo bubo in relation to habitat characteristics in the Eifel, Germany

Eurasian Eagle-Owl (Bubo bubo) Science Article 1 abstract Eagle Owls Bubo bubo were successfully reintroduced in the Eifel (Germany) in 1974-1999. Here we analyse whether reproductive success was related to habitat characteristics and if the patterns of habitat use and reproduction changed during the population increase. Microclimatic as well as mesoclimatic conditions influenced reproductive success. […]

Consequences of Eagle Owl nest-site habitat preference for breeding performance and territory stability

Eurasian Eagle-Owl (Bubo bubo) Science Article 9 abstract I tested the hypothesis that nest-site habitat preferences are adaptive in an Eagle Owl (Bubo bubo) population fromCentral Spain. Eagle Owls preferred to settle in areas linked with watercourses and with more irregular topography (physiographic gradient) and cover of dehesas andMediterranean forests (vegetation gradient), whereas they avoided […]

Habitat preference models for nesting Eagle Owls Bubo bubo: How much can be inferred from changes with spatial scale?

Eurasian Eagle-Owl (Bubo bubo) Science Article 5 abstract Aims: To analyze whether habitat preference patterns of the Eagle Owl Bubo bubo change with spatial scale in an area of very high rabbit Oryctolagus cuniculus density as compared to an area of lower prey availability (Martinez et al., 2003a).Location: An area of over 2,100 km2 located […]

Effects of landscape spatial structure and composition on the settlement of the Eagle Owl Bubo bubo in a Mediterranean habitat

Eurasian Eagle-Owl (Bubo bubo) Science Article 7 abstract We analysed the breeding density of a Mediterranean Eagle Owl Bubo bubo population and the characteristics of the landscape surrounding the nest, in an attempt to identify the determinants of habitat preferences within a radius of 1000 m around each nest. A total of 59 nest site […]

Eagle Owl Bubo bubo proximity can lower productivity of cliff-nesting Peregrines Falco peregrinus

Eurasian Eagle-Owl (Bubo bubo) Science Article 6 abstract The Eagle Owl Bubo bubo is conventionally regarded as an important predator of smaller diurnal birds of prey. In this study, we analysed the relationships between Peregrine productivity and the proximity to Eagle Owl nests/cliffs in a cliff-nesting Peregrine Falco peregrinus population across the central pre-Alps of […]