Rock and roll: Inferred costs of Black Wheatear stone-carrying displays
Stone morphometry has an impact on courtship behaviour
Stone morphometry has an impact on courtship behaviour
Comparing cavity-nesting and open-cup-nesting species.
Should these birds breed early or late?
Western Bluebirds tend to produce more sons at the start of the breeding season.
Identifying a trade-off between self-maintenance and incubation