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
Common emerald dove Common emerald dove The common emerald dove, Asian emerald dove, or grey-capped emerald dove ("Chalcophaps indica") is a pigeon which is a widespread resident breeding bird in the tropical and sub-tropical parts of the Indian Subcontinent and east through Myanmar, Vietnam, Thailand, Malaysia, the Philippines, Taiwan, the Sakishima Islands of Japan and Indonesia. The dove is also known by the names of green dove and green-winged pigeon. The common emerald dove is the state bird of the Indian state of Tamil Nadu. The Pacific emerald dove and Stephan's emerald dove were both considered conspecific. This is a common species in