Nest attendants in parakeet auklets

Abstract 10.1002/zoo.1027.abs Breeding behaviors in a captive population of parakeet auklets (Cyclorrhynchus psittacula) were observed to determine whether a third bird present at the entrances to nest tunnels was a helper or competitor. Comparisons were made between focal pairs of nesting birds, two with and two without attendants. Pairs with attendants spent more time feeding […]