Rogers, Amy C.; Langmore, Naomi E.; Mulder, Raoul A. - In: Behavioral Ecology 18 (2007) 1, pp. 182-188
Paired male and female eastern whipbirds, Psophodes olivaceus, sing precisely coordinated, male-led duets. Four broad explanations have been proposed for the function of duets: 1) cooperative resource defense, 2) prevention of partner usurpation, 3) defense of an individual's own position within...