Recently added articles from Bird Study:
Non-breeding fæder Ruffs Philomachus pugnax associate according to sex, not morphology
Nov 01, 2008; ... Capsule Fæders (males that are female look-alikes) associate with males rather than females, at several different spatial scales. Aims To test the prediction that the occurrence in space and time of fæders on ecological grounds should track that of females. Methods The fraction ...
Does variation in demographic parameters account for regional variation in Northern Lapwing Vanellus vanellus population declines across Great Britain?
Nov 01, 2008; ... Capsule Variations in regional nest survival rates, natal philopatry, first-year and adult survival cannot explain regional Northern Lapwing population declines. Aims To assess whether regional nest survival rates, natal dispersal, and first-year and adult survival rates could explain ...
Breeding performance and diet of Great Skuas Stercorarius skua and Parasitic Jaegers (Arctic Skuas) S. parasiticus on the west coast of Scotland
Nov 01, 2008; ... Capsule The Arctic Skua colony on Handa Island is in decline, probably due to pressure from Great Skuas. Aims To assess the factors affecting Great Skua productivity, and the effects of Great Skuas on breeding Arctic Skuas. Methods From 2003 to 2006 population and breeding ...
Long-term population declines in Danish trans-Saharan migrant birds
Nov 01, 2008; ... Capsule Long-distance migrant birds show less favourable trends than sedentary/short-distance species. Aims To use breeding bird surveys to contrast population trends amongst common species according to their migration pattern. Methods Changes in abundance of 62 Danish breeding ...
Selection of foraging habitat and nestling diet by Meadow Pipits Anthus pratensis breeding on intensively grazed moorland
Nov 01, 2008; ... Capsule Foraging sites with low vegetation height and density, but with high arthropod biomass, are selected. Aims To test the hypothesis that on intensively grazed moorland, breeding Meadow Pipits forage for nestling food where arthropod prey are most readily available, and therefore ...