Seasonal variation in the song structure of tui (Prosthemadera novaeseelandiae)
Birdsong has evolved to help individual birds attract mates and defend territories. The breeding season is a critical period in the life history of many songbird species and previous studies indicate that bird vocal behaviour changes at the onset of breeding season. In this study, we compared the complex songs of a seasonal-breeding New Zealand honeyeater, the tui (Prosthemadera novaeseelandiae), between breeding and non-breeding seasons.