Despite decades of research, our understanding of the underlying causes of within-
population variation in patterns of extra-pair paternity (EPP) remains limited. Previous …

Sex‐biased mortality can lead to altered adult sex ratios (ASR s), which may in turn lead to
harassment and lower fitness of the rarer sex and changes in the mating system. Female …

Lead exposure is a concern in urban ecosystems, with physiological and behavioral effects
well documented in humans. Wildlife inhabiting urban ecosystems are also exposed to lead …

Adoption and foster care posits itself as an evolutionary paradox, especially when there is
no kinship involved. Adopting non-related eggs or infants proximately comes with a cost in …

Incubation behaviour is essential for understanding the reproductive success in birds. For
example, the orientation of the bird is important for reducing incubation costs associated with …

Background Certainty of paternity is considered an important factor in the evolution of
paternal care. Several meta-analyses across birds support this idea, particularly for species …

Species reintroductions can be used in conservation management to increase biodiversity
and aid in restoring ecosystem function. For reintroductions to be successful, it is important …

Most species of bats give birth to only 1 pup each year, although Eastern red bats (Lasiurus
borealis) can produce up to 5 pups per litter. Offspring in a single litter have been …

The emu is a useful and new breed of poultry, but their genetic improvement has not
advanced yet due to their very recent domestication. Pedigree information is difficult to …

Highlights•Significant association between songbird EPP frequency and within-song
complexity.•Tui broadcast songs had higher song complexity than interactive …