The study was carried out during the free-flying period. Pairs share incubation between two sexes. In observations made 2013 and 2015 (n=79 in day). Females incubated for 177.08 minutes per day on average while males 240.99 day. This period is statistically different (P< 0.0001) withmales staying 23-32% longer than females. stayed together only a short time. According to made(n=79), couples ...