Dunnock two or three adjacent female territories overlap one male territory, and so polygyny is favored, with the male monopolising several females. Polygynandry also exists, in which two males jointly defend a territory containing several females. Polyandry, though, is the most common mating system of dunnocks found in nature. Depending on the population, males generally have the best reproductive success in polygynous populations, while females have the advantage during polyandry. Studies have illustrated the fluidity of dunnock mating systems. When given food in abundance, female territory size is reduced drastically. Consequently, males can more easily monopolise the females. Thus, the mating
Bird Island, Seychelles Bird Island, Seychelles Bird Island is the northernmost island in the Seychelles archipelago, 100 km from Mahe. The 0.94 km coral island is known for its birdlife, including sooty terns, fairy terns and common noddies, and for hawksbill and green turtles. It is now a private resort with 26 bungalows. It also contains a small weather station and a small landing strip Bird Island Airport which connects the island with Mahe. Bird Island used to be known as "Île aux Vaches" due to the numerous dugongs (sea cows) that lived in nearby waters. Between 1896 and 1906, 17,000 tons of