Intraspecific aggression at tara iti (New Zealand fairy tern, Sternula nereis davisae) nests

Conservation of the critically endangered New Zealand fairy tern (Sternula nereis davisae) has focused on predator control, habitat management, and intensive monitoring. However, intra-specific social dynamics at nest sites can also influence breeding success. This observational study examines aggression between adults when a female mates with more than one male or when an unpaired male persistently attends a nest. Using detailed observations from Waipū in 2015-16, supported by comparative cases