Northern Shrike (Lanius excubitor) Science Article 10 abstract For diurnal predators the short time of winter daylight may limit the possibilities to feed and hunt. In this field study, these aspects, as well as roosting behaviour,were evaluated in wild Great Grey Shrikes (Lanius e. excubitor). The main roost-sites were large junipers (Juniperus communis) and willows […]
Tag: Lanius excubitor
Which method is most suitable for censusingbreeding populations of red-backed (Laniuscollurio) and great grey (L. excubitor) shrikes?
Northern Shrike (Lanius excubitor) Science Article 7 abstract Up to now, studies have shown that it is very difficult to estimate accurate numbers of shrike(Lanius spp) breeding pairs. During our shrike biology research in Western Poland this problemwas evident. Actual breeding pair numbers were derived from a combination of specialcounts in the pre-breeding period, intensive […]
Non-breeding site fidelity in northern shrikes
Northern Shrike (Lanius excubitor) Science Article 3 abstract Band-recovery data were examined for evidence of interseasonal non-breeding site fidelity in the Northern Shrike (Lanius excubitor), an irregular, long-distance migrant to the northern temperate zone. Despite the low rate of recapture (0.9%) of banded Northern Shrikes in subsequent years, recovery data revealed that 12 individuals were […]
Animals of different phenotype differentially utilise dietary niche-the case of the Great Grey Shrike Lanius excubitor
Northern Shrike (Lanius excubitor) Science Article 9 abstract We tested the morphological trait utility in Great Grey Shrike Lanius excubitor. The food composition was used as an indicator of phenotype performance advantage in utilising of particular dietary niche. Mounts and accompanying data (measurements and stomach contents) from the Slovak extensive collection, involving adult birds obtained […]
Interspecific feeding of a Great Grey Shrike (Lanius excubitor) fledgling by adult Yellowhammers (Emberiza citrinella)
Northern Shrike (Lanius excubitor) Science Article 4 abstract On 25 May 2003, near the village Budy (Biebrza Marshes, East Poland), interspecific feedingof a Great Grey Shrike (Lanius excubitor) fledgling by adult Yellowhammers (Emberiza citrinella) wasobserved. R. Drozdz, M. Hromada and P. Tryjanowski, BIOLOGICAL LETT. 2004, 41(2): 185n187 Download article download full text (pdf)
Flocks of the Great Grey Shrike (Lanius excubitor) on migration
Northern Shrike (Lanius excubitor) Science Article 5 abstract Great Grey Shrikes are usually territorial all the year round. However, flocks of up to 15 individuals have been observed on migration in Poland recently. On 3rd November 2001 in the morning, I observed a flock of 110 Great Grey Shrikes near ponds in Zimno (E Poland). […]
Presence of the great grey shrike Lanius excubitor affects breeding passerine assemblage
Northern Shrike (Lanius excubitor) Science Article 6 abstract The great grey shrike, Lanius excubitor, is known to be a raptor-like passerine. In addition to invertebrate prey, its diet also consists of vertebrates, including small birds. We examined the effect of presence of the great grey shrike on the breeding assemblages of small passerine birds in […]
Repeatability of Measurements and Shrinkage after Skinning: the Case of the Great Grey Shrike Lanius excubitor
Northern Shrike (Lanius excubitor) Science Article 8 abstract In studies on avian systematics and ecology, data from birds in museum collections are often used. Therefore, it is very important to test how representative such material is. However, museum specimens are usually handled, preserved and kept in different ways, which complicates the comparative use of measurements […]
Breeding biology of the Great Grey Shrike (Lanius excubitor): an analysis of nest record cards
Northern Shrike (Lanius excubitor) Science Article 2 abstract The aim of the study was to present variability in nest and breeding parameters of the Great Grey Shrike in Poland. We analyzed 83 nest record cards. Most data were recorded in 1982-2002. The analyzed parameters included: nest location, nest height, nest structure, breeding phenology, clutch size, […]
The breeding population of the Great Grey Shrike (Lanius excubitor) in Austria, 1995-2003
Northern Shrike (Lanius excubitor) Science Article 1 abstract Since the 1980s, the breeding range of the Great Grey Shrike in Austria has been restricted to the northern part of Lower Austria. Since 1995, this breeding population has been fully censused to obtain base-line population levels. Every breeding locality was examined 6-8 times each season. In […]