Nest-site selection of the Long-eared Owl<i>Asio otus</i>in northwestern Switzerland

Henrioux, F.

doi:10.1080/00063650209461272

Cited by 15 publications

(14 citation statements)

References 12 publications

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“…Pri postavljanju popisnih točk smo upoštevali primeren habitat in najmanjšo razdaljo med popisnimi točkami po Henrioux (2002), ki mora biti vsaj 300 m. Popisovalec je najprej na točki dve minuti poslušal, nato tri minute predvajal posnetek teritorialnega oglašanja samca in nato še dve minuti poslušal in opazoval z namenom videti morebitno malo uharico. Malo uharico smo popisovali na točkah 2, 4, 8, 11, 14 in 16 (slika 3).…”

Section: Nočni Popisunclassified

Gnezdilke Parka Škocjanske jame (Kras, JZ Slovenija)/ The breeding birds of Škocjan Caves Park (Kras, SW Slovenia)

Figelj¹,

Kmecl²

2014

Acrocephalus

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The aim of the study done in 2011 and 2012 was to identify the number of breeding bird species, to provide population estimates as well as to evaluate the conservational importance of Škocjan Caves Park for birds. Common bird species were surveyed using the territory mapping method. Rare species and nocturnally active species were surveyed using species-specific methods: observation, the playback method and the line transect method. 81 species were registered, 49 of which bred within the boundaries of the Park. The most abundant breeding species were Blackcap Sylvia atricapilla (260-320 breeding pairs), Robin Erithacus rubecula (250-310 breeding pairs), Blackbird Turdus merula (230-280 breeding pairs), Chaffinch Fringilla coelebs (230-280 breeding pairs) and Marsh Tit Poecile palustris (200-240 breeding pairs). Qualifying species for the Special Protected Area (SPA) Kras (SI5000023) also bred within the Park: Peregrine Falcon Falco peregrinus, Nightjar Caprimulgus europaeus, Scops Owl Otus scops and Woodlark Lululla arborea. Eagle Owl Bubo bubo was also registered, but breeding attempts during the study period were unsuccessful due to the negative influence of several factors. One of the largest colonies of Alpine Swifts Apus melba, a rare and localized species in Slovenia, is also of conservation concern.

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Section: Nočni Popisunclassified

Gnezdilke Parka Škocjanske jame (Kras, JZ Slovenija)/ The breeding birds of Škocjan Caves Park (Kras, SW Slovenia)

Figelj¹,

Kmecl²

2014

Acrocephalus

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“…2002) could be associated with a loose attachment to a particular breeding site, and may imply that there is little re‐occupancy of the same nest in successive years. Very low re‐occupancy rates have also been reported in some sedentary populations (Mikkola 1983, Henrioux 2002). By contrast, we show that a proportion of nest‐sites may be used more than once.…”

mentioning

confidence: 97%

“…For the Long‐eared Owl Asio otus , relevant information on nesting habits has been collected in deserts (Craig & Trost 1979, Marks 1986, Fahler & Flake 2002), coniferous forests (Bull et al . 1989) and agricultural landscapes in temperate areas (Galeotti et al . 2000, Henrioux 2002, Tome 2003).…”

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confidence: 99%

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Landscape and anti‐predation determinants of nest‐site selection, nest distribution and productivity in a Mediterranean population of Long‐eared Owls Asio otus

Rodrı́guez

Garcı́a

Cervera³

et al. 2006

Ibis

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Nest predation is an important determinant of owl breeding success. We studied Long‐eared Owl Asio otus productivity and attributes of nest‐sites at the microhabitat and landscape scales in a Mediterranean locality over an 8‐year period. We examined the effect on nest location and productivity of protective cover in concealing the nest from aerial and terrestrial predators. A dense cover of ivy and tree‐foliage at canopy level favoured nest location but not productivity. By contrast, high shrub cover beneath the nest was selected by Owls and was positively related to both the site reoccupancy rate and the overall number of young fledged. Pre‐fledging Owls use the ground, where they are exposed to terrestrial predators, which are much more abundant in the study area than are aerial predators. Our results therefore support the hypothesis that Owls adapt nest‐site choice to local sources of predation risk. As reported elsewhere, Long‐eared Owls in our study area showed restricted territoriality and nested in clusters. As active nest‐sites during the same breeding season were more than 1 km apart on average, and their productivity was never greater for clustered nests than for more isolated nests, nest aggregation could not be interpreted as a case of facultative colonial breeding, which has been reported for this species in other areas. Neither landscape variables indicative of the availability of foraging areas nor structural attributes that protect young from predators explained the remarkable scarcity of nests in half of the study area. Unmeasured factors such as human disturbance could explain the pattern of distribution of Long‐eared Owl nests.

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“…Birrer's (2009) synthesis of the owls' diet, for example, is based on over 800,000 prey items found in pellets from 312 studies from all over the world. Although not so extensively reported, the breeding habits of the species are also well known: breeding density and territory size (Sergio et al 2008, Mebs & Scherzinger 2000, nest site and habitat selection (Marks 1986, Scott 1997, Henrioux 2000, 2002, Tome 2003a, Rodriguez et al 2006, breeding success per se (Glue 1977, Pessner & Hartung 1989, Tome 1997) and how it is affected by changing food availability (Village 1981, Wijnandts 1984, Korpimäki 1992. However, there is not a single published study dealing with young owls during the post-fledging period, when the mortality rate in birds is among the highest (Gill 1994).…”

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confidence: 99%

Post‐fledging survival and dynamics of dispersal in Long‐eared OwlsAsio otus

Tome

2011

Bird Study

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Nest-site selection of the Long-eared OwlAsio otusin northwestern Switzerland

Cited by 15 publications

References 12 publications

Gnezdilke Parka Škocjanske jame (Kras, JZ Slovenija)/ The breeding birds of Škocjan Caves Park (Kras, SW Slovenia)

Gnezdilke Parka Škocjanske jame (Kras, JZ Slovenija)/ The breeding birds of Škocjan Caves Park (Kras, SW Slovenia)

Landscape and anti‐predation determinants of nest‐site selection, nest distribution and productivity in a Mediterranean population of Long‐eared Owls Asio otus

Post‐fledging survival and dynamics of dispersal in Long‐eared OwlsAsio otus

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