The ability of individual organisms to alter morphological and life‐history traits in response to
the conditions they experience is an example of phenotypic plasticity which is fundamental …

Birds are constantly responding to stimuli from their environment. When these stimuli are
perceived as threatening, stress responses are initiated, with activation of the hypothalamo …

Summary 1 Genetic and environmental maternal effects can play an important role in the
evolutionary dynamics of a population: they may have a substantial impact on the rate and …

Introduction Food availability is an important environmental cue for animals for deciding how
much to invest in reproduction, and it ultimately affects population size. The importance of …

Now that more than half of the world's population lives in cities, the study of birds in urban
ecosystems has emerged at the forefront of ornithological research. An international team of …

Identifying genes that underlie ecological traits will open exiting possibilities to study gene–
environment interactions in shaping phenotypes and in measuring natural selection on …

The relative contribution of sexual and natural selection to evolution of sexual ornaments
has rarely been quantified under natural conditions. In this study we used a long-term …

Evolutionary change results from selection acting on genetic variation. For migration to be
successful, many different aspects of an animal's physiology and behaviour need to function …

The mangrove rivulus (Kryptolebias marmoratus) is a small fish native to mangrove
ecosystems in Florida, the Caribbean, Central America, and South America. This species is …

Several species of birds and mammals overcome periods of scarcity by caching food, but for
the vast majority of species, it is virtually unknown whether they are food limited during these …