Rose-coloured Starling (Pastor roseus) Science Article 1 abstract Biometric and plumage data on breeding Rose-coloured Starlings Sturnus roseus showed that the species is partially sexually dimorphic in size and plumage colour. Both sexes develop a brood patch, although it is most frequently found in females. Although males are generally more intensely coloured than females, there […]
Category: Passeriformes
Mate choice is not important for female reproductive success in the common Rosefinch (Carpodacus erythrinus)
Rosefinch (Carpodacus erythrinus) Science Article 1 abstract I studied mate choice in relation to female reproductive success in the Common Rosefinch( Carpodacuesr ythrinuso) over a four-year period. Approximately 50-99% of the variance in female reproductive success was due to nest predation during incubation. Because males did not defend nest sites and females probably face time […]
Habitat preferences of foraging Rooks Corvus frugilegus during the breeding period in the agricultural landscape of eastern Poland
Rook (Corvus frugilegus) Science Article 2 abstract The study was carried out in 2000-2002 around 6 rookeries. Rooks foraged in numbers from 1 to 132 birds (n = 417); flocks of less than 10 individuals were dominant. The type of crop influenced the size of a foraging flock. Most of the rooks were recorded within […]
Male Rock Sparrow (Petronia petronia) Nest Defence Correlates with Female Ornament Size
Rock Sparrow (Petronia petronia) Science Article 1 abstract We investigated the relationship between male nest defence and female breastpatch size in an alpine population of rock sparrow (Petronia petronia)in northernItaly. We presented a mounted weasel Matteo Griggio et al, Ethology 109, 659-669 (2003) Download article download full text (pdf)
Neergang en herstel van de Roek als broedvogel in Nederland in de 20e eeuw
Rook (Corvus frugilegus) Science Article 1 abstract Jarenlange vervolging en een daaruit volgende afname brachtende broedpopulatie van de Roek vijftig jaar geleden op een dieptepunt.Verminderd gebruik van gifstoffen en een wettelijke beschermingleidden in de jaren zeventig van de vorige eeuw inveel voormalige broedgebieden een spectaculair herstel in.Inmiddels lijkt de populatiegroei te stagneren. Tegelijk neemt hetaantal […]
Investigating Physical Cognitionin Rooks, Corvus frugilegus
Rook (Corvus frugilegus) Science Article 3 abstract Although animals (particularly tool-users) are capable of solving physical tasks in the laboratory, the degree to which they understand them in terms of their underlying physical forces is a matter of contention. Here, using a new paradigm, the two-trap tube task, we report the performance of non-tool-using rooks. […]
Non-tool-using rooks, Corvus frugilegus, solve the trap-tube problem
Rook (Corvus frugilegus) Science Article 4 abstract The trap-tube problem is used to assess whether an individual is able to foresee the outcome of its actions. To solve the task, an animal must use a tool to push a piece of food out of a tube, which has a trap along its length. An animal […]
Open-habitat birds in recently burned areas: the role of the fire extent and species’ habitat breadth
Rock Bunting (Emberiza cia) Science Article 1 abstract Single burned areas contained 0 to 15 open-habitat species (mean = 7.6), and in all the areas combined there were 22 species, including 17 with an unfavourable conservation status in Europe. The most frequent were Carduelis cannabina, Lullula arborea, Alectoris rufa, Oenanthe hispanica and Emberiza cia, but […]
REPORT ON A SURVEY OF RING OUZEL Turdus torquatus torquatus TERRITORIES IN ROSEDALE AND OTHER AREAS OF THE NORTH YORK MOORS IN 2008
Ring Ouzel (Turdus torquatus) Science Article 2 abstract The 2008 survey was the ninth year in which a detailed study had been made of the ring ouzel Turdus torquatus torquatus (RZ) population in the North York Moors National Park and continued the work started in 1999 (foot & mouth preventing work in 2001). The findings […]
Older male reed buntings are more successful at gainingextrapair fertilizations
Reed Bunting (Emberiza schoeniclus) Science Article 8 abstract The importance of extrapair paternity (EPP) as an aspect of mixed reproductive strategies is currently thefocus of many studies. Since females have at least some control over the occurrence of inseminations, theyare expected to engage in extrapair copulations only if they benefit, for instance through gaining highqualityor […]