Bird mortality as a result of collisions with power lines has been of increasing concern in
recent decades, but the real impact on bird populations requires an experimental …

Great Bustards Otis tarda have expanded their habitat range from historical occupancy of
natural steppes to arable farmland, where the species initially benefited from favourable …

We investigated the effects of human activities on the behaviour of great bustards (Otis
tarda) in a Special Protection Area in central Spain. We recorded 532 disturbances, at a rate …

Summary 1 We investigated the causes of natal dispersal in four Spanish areas where 35
breeding groups of the polygynous great bustard Otis tarda were monitored intensively. A …

For many years anticoagulant rodenticides have been used in vole control campaigns, in
spite of the proven risk of secondary poisoning of non-target predators and scavengers. In …

Distribution, size and recent trends of the Great Bustard Otis tarda population in Madrid
region, Spain. Between 1998 and 2002 we carried out five spring censuses of the Great …

Local changes in land use can influence patterns of habitat selection by farmland birds, thus
biasing predictions of population responses to land use changes based on wildlife-habitat or …

We explored migration patterns in Great bustards (Otis tarda), a species that shows strong
sexual selection and the most extreme sexual size dimorphism among birds. The aim was to …

Visual displays are signals that may be selected to increase visibility. Light is a crucial
component in the transmission of visual signals, and white colour is very conspicuous when …

A detailed knowledge of the habitat requirements of steppe birds living in farmland habitats
is necessary to identify agricultural practices compatible with their conservation. The globally …