Dunnock relatively lower success for females. In times of scarcity, female territories expand to accommodate the lack of resources, causing males to have a more difficult time monopolizing females. Hence, females gain a reproductive advantage over males in this case. The dunnock possesses variable mating systems. Females are often polyandrous, breeding with two or more males at once, which is quite rare among birds. This multiple mating system leads to the development of sperm competition amongst the male suitors. DNA fingerprinting has shown that chicks within a brood often have different fathers, depending on the success of the males at monopolising
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