Dispersal movements of animals may be jointly influenced by the phenotype of dispersers and the environmental and social conditions in the source and destination areas. Dispersal is often strongly influenced by population density, but the presence of conspecifics may affect dispersal motivation differentially depending on the social tolerance or size-based dominance of individuals, thus generating phenotypic differences between dispersers and non-dispersers. In this study, a pied flycatcher...

Understanding how density dependence modifies demographic parameters in long-lived vertebrates is a challenge for ecologists. A number of studies have highlighted the importance of habitat heterogeneity in density dependence in territorial species, but less information exists on demographic processes in colonial species. In this study, long-term data from a recovering population of Cinereous Vultures in southern Spain were used to evaluate environmental and population parameters influencing...