Consistent individual differences in behavior [ie, behavioral types (BTs)], are common
across the animal kingdom. Consistency can make behavior an adaptive trait for mate …

Highlights•Behavioural similarity within mated pairs may impact reproductive success.•We
quantified nest defence behaviour of eastern bluebirds and tested three hypotheses.•The …

Boldness, defined as the behavioural response of individuals when facing a risky situation,
is a major personality trait and often phenotypically correlates with other behavioural traits …

Personality varies among individuals and is influenced by the environment. Here, we tested
the hypothesis that egg incubation temperature had carry-over effects on swimming activity …

Despite classical expectations of a trade-off between immune activity and reproduction, an
emergent view suggests that individuals experiencing activation of their immune system …

In biparental species, conflict between the sexes is expected when optimal levels of parental
care differ between males and females. We studied food provisioning in house wrens …

The extended pace-of-life syndrome (POLS) hypothesis suggests that variation in boldness-
like behaviors has co-evolved with variation in life-history strategies within populations, yet …

Animal personalities have been studied extensively in the last decade. It is still not entirely
understood, however, how different personalities evolve and persist. The social niche …

Detailed descriptions of song structure are critical to understanding the ontogeny, evolution,
and function of bird song, particularly for species with large song repertoires. We provide a …

Predation is a significant cause of nest failure in passerine birds, and, thus, natural selection
is expected to favor behavioral plasticity to allow birds to respond to perceived changes in …