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
The Mockery Bird The Mockery Bird The Mockery Bird is a humorous novel by Gerald Durrell, published in 1981 by William Collins, Sons and Co Ltd. The book, like the other works of the author, contains a strong environmental message. The story takes place on a (fictitious) tropical island called Zenkali. The island seems to be populated by the most eccentric people who came there from all around the world, along with the two indigenous tribes, the Fangoua and the Ginka. The Ginkas used to worship a dolphin god, while the Fangouas worshipped a strange avian, the Mockery Bird, which was hunted to