Is timing of moult adaptive?
Two species suffer catastrophic embryo mortality in recent heatwaves
Shiny feathers in the mountains
Mountain babblers reflect more UV light than lowland babblers
How did the Iberá Seedeater form?
Novel plumage produced through genome reshuffling generates a new species
Endocrine-morphology links across seasons in a migrant bird
Geese with elevated corticosterone during summer have lower body-weight the subsequent winter
The lie of the “black lightning”: signal reliability in a seabird
Does Storm Petrels’ plumage coloration reliably signal body condition?
Explosive wagtail evolution
Plumage phenotypes, mitochondrial DNA and nuclear DNA tell different stories
The dark side of the nestling
Darker nestlings display bolder personalities, but only if they are female
Bird photography is here to stay
Using field photography to study avian moult
Drab females are warm mothers
Less pigmented females have warm brood patches