The capacity of species to track changing environmental conditions is a key component of
population and range changes in response to environmental change. High levels of local …

When species occupy habitats that vary in quality, choice of habitat can be critical in
determining individual fitness. In most migratory species, juveniles migrate independently of …

How seasonal migration originated and impacted diversification in birds remains largely
unknown. Although migratory behaviour is likely to affect bird diversification, previous …

Seasonal migration is prevalent in approximately one fifth of all bird species. Due to the high
energetic costs of migration, consistent morphological patterns can be observed across …

Phenological changes in response to climate change have been recorded in many taxa, but
the population‐level consequences of these changes are largely unknown. If phenological …

Niche expansion can lead to adaptive differentiation and speciation, but there are few
examples from contemporary niche expansions about how this process is initiated. We …

Aim Despite the strong evidence of species range shifts as a response to environmental
change, attempts to identify species traits that modulate those shifts have been equivocal …

In many animals, processes occurring in one season carry over to influence reproductive
success and survival in future seasons. The strength of such carry-over effects is unlikely to …

In response to environmental change, species have been observed altering their migratory
behaviours. Few studies, however, have been able to determine whether these alterations …

Aim Over the past three decades, evidence has been growing that many Afro‐Palaearctic
migratory bird populations have suffered sustained and severe declines. As causes of these …