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Article
P. Tryjanowski, Auteur ; T. H. Sparks, Auteur ; J. Ptaszyk, Auteur ; J. Kosicki, AuteurCapsule: Arrival date strongly influenced date of breeding and breeding success. Aim: To check our hypothesis that in years with low April temperatures, i.e. when storks started to breed, the relationship between timing of breeding and success w[...]
Article
M. Hromada, Auteur ; L. Kuczynski, Auteur ; A. Kristin, Auteur ; P. Tryjanowski, AuteurWe 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 (measurement[...]
Article
T. H. Sparks, Auteur ; S. Atkinson, Auteur ; K. Lewthwaite, Auteur ; R. Dhap, Auteur ; N. J. Moran, Auteur ; P. Tryjanowski, AuteurUsing data from two independent UK citizen science schemes we investigate evidence for declines in abundance of Common Cuckoo Cuculus canorus, a species that is particularly easy to record. One of the schemes (Nature's Calendar) involves phenolo[...]
Article
J. Ptaszyk, Auteur ; J. Kosicki, Auteur ; T. H. Sparks, Auteur ; P. Tryjanowski, AuteurChanges in the spring arrival dates of migrant birds, particularly passerines, have been -reported from a range of locations. In this paper we take the opportunity provided by a -detailed monitoring scheme to examine several features of the timi[...]
Article
R. Yosef, Auteur ; P. Tryjanowski, AuteurThe Ortolan Bunting in Europe is considered vulnerable and large declines have been reported. However, there is little information pertaining to the wintering grounds and the migratory part of the annual life cycle of the Ortolan Bunting across [...]
Article
J. Kosicki, Auteur ; T. Sparks, Auteur ; P. Tryjanowski, Auteur
Article
P. Tryjanowski, Auteur ; S. Kuzniak, Auteur ; B. Diehl, Auteur
Article
P. Tryjanowski, Auteur ; A. Surmacki, Auteur ; J. Bednorz, AuteurBased on the fate of 48 nests of Raven Corvus corax we tested the hypothesis that low return rates of Raven were caused by unsuccessful nesting attempts in previous seasons. Ravens nested on electrical power pylons in 19961998 in an intensively [...]
Article
P. Tryjanowski, Auteur ; S. Kuzniak, Auteur
Article
C. Mitrus, Auteur ; T. H. Sparks, Auteur ; P. Tryjanowski, AuteurWe analysed data on the Red-breasted Flycatcher Ficedula parva collected in old-growth, oak-hornbeam stands in the primeval Bialowieza Forest, Poland during 1973-2002. In this period, the Red-breasted Flycatcher's return to its breeding sites be[...]
Article
T. H. Sparks, Auteur ; K. Huber, Auteur ; R. L. Bland, Auteur ; H. Q. P. Crick, Auteur ; P. J. Croxton, Auteur ; J. Flood, Auteur ; R. G. Loxton, Auteur ; C. F. Mason, Auteur ; J. A. Newnham, Auteur ; P. Tryjanowski, AuteurWe examine the first arrival and last departure dates of migrant bird species from, respectively, six and three English area bird reports. Of all 145 bird series, 50% demonstrated significantly earlier arrival in recent years, with the average a[...]
Article
P. Tryjanowski, Auteur ; S. Kuzniak, AuteurWe studied population size and productivity of White Storks Ciconia ciconia in 1983-2000 in 417 km(2) of the Obra river valley in western Poland and its response to Common Vole Microtus arvalis density. The 33 to 60 nesting pairs fluctuated in c[...]
Article
M. Antczak, Auteur ; M. Hromada, Auteur ; P. Tryjanowski, AuteurThe Great Grey Shrike Lanius excubitor, as well as other species of family Laniidae, recognise humans as potential predators and actively defend nests. During an intensive study in western Poland we examined the influence of observer visits on b[...]
Article
P. Tryjanowski, Auteur ; T. H. Sparks, Auteur ; L. Kuczynski, Auteur ; S. Kuzniak, AuteurFrom some life-history traits, avian egg size can be postulated as potentially affected by climate change. In this paper, we present and discuss the potential effect of mean temperature in the breeding season on egg size of the red-backed shrike[...]
Article
A. Marcin, Auteur ; M. Hromada, Auteur ; P. Tryjanowski, AuteurWe studied temporal and spatial patterns of impaling behaviour in a resident population of the Great Grey Shrike Lanius excubitor throughout the year. The information was collected in western Poland during the years 2000-2003. The presented find[...]
Article
P. Tryjanowski, Auteur ; S. Kuzniak, Auteur ; T. H. Sparks, AuteurWe analysed which among four factors (mean first arrival date, migration distance, changes in population size, detectability of species) influenced the magnitude of change (regression coefficient) in the first arrival dates of 30 migrant bird sp[...]
