Oldřich Tomášek

This study examines the relationship between corticosterone levels in feathers and feather growth rate or quality across passerine birds, finding no association but suggesting elevation may influence corticosterone levels.

This study investigates conspecific brood parasitism in barn swallows and finds it rare, challenging previous assumptions and highlighting the need for rigorous genetic validation.

The paper compares plasma steroid hormone levels between Afrotropical and Palearctic passerines, finding lower baseline corticosterone and testosterone in tropical species.

This study shows that recent breeding experience improves egg ejection behavior in barn swallows, suggesting awareness of own egg-laying is key, not a template image.