Abstract. Understanding habitat quality for birds is crucial for ecologists and managers, but
few papers have explored the advantages and disadvantages of different ways to measure …

Our understanding of migratory birds' year‐round ecology and evolution remains patchy
despite recent fundamental advances. Periodic reviews focus future research and inform …

From the red grouse to the Ethiopian bush-crow, bird populations around the world can
provide us with vital insights into the effects of climate change on species and ecosystems …

The main objective of many conservation programs is to increase population size by
improving a species' survival and reproduction. However, density dependence of …

Avian nest site selection and levels of parental care require assessments of numerous
fitness costs and benefits. Nest site selection in open cup–nesting species is considered a …

Despite the importance of population structures throughout ecology, relatively little
theoretical attention has been paid to understanding the implications of social groups for …

Effective conservation and management of migratory bird species requires an
understanding of when and how their populations are limited and regulated. Since 1969, my …

The selection of breeding sites in heterogeneous habitats should ideally be based on cues
closely reflecting habitat quality and thus predicting realized individual fitness. Using long …

Protected natural areas deserve the combination of nature uniqueness and conservation
willing. The foundation stone for National Parks is the awareness of that unique character …

A mechanistic understanding of the dynamics of populations requires knowledge about the
variation of the underlying demographic rates and about the reasons for their variability. In …