Latest Brood parasite Stories
Researchers at the University of Veterinary Medicine, Vienna have discovered that tree sparrows can recognize eggs deposited by other tree sparrows but do not always reject them.
Some disease-causing parasites are known to favor one sex over the other in their host species, and such differences between the sexes have generally been attributed to differences in immune responses or behavior.
Researchers at the University of Sheffield have discovered that cuckoo eggs are internally incubated by the female bird for up to 24 hours before birth, solving for the first time the mystery as to how a cuckoo chick is able to hatch in advance of a hostÂ´s eggs and brutally evict them.
Reed warblers live with the threat that a cuckoo bird will infiltrate their nest, remove one of their eggs, and replace it with the cuckoo's own. This 'parasitism' enables the cuckoo to have its young raised by unsuspecting reed warblers.
The Black-headed Duck, (Heteronetta atricapilla), is a species of stiff-tailed duck from the subfamily Oxyurinae and the family Anatidae. It is the only member of its genus Heteronetta. Its habitat is swamps, lakes and marshes in Northern Chile, Paraguay, and Northern Argentina. This species is not considered threatened by the IUCN. The Black-headed Duck is the most primitive member of its subfamily, and lacks the stiff tail and swollen bill seen in its relatives. Though resembling a...
The Common Hawk-cuckoo (Cuculus varius) also commonly called the Brainfever bird, is a species of cuckoo that occurs in Punjab, Pakistan east across much of the Indian peninsula, Bangladesh, and Sri Lanka. It is found at altitudes of 2600 feet in the Himalayas. Most birds are resident but ones that occur at higher altitudes or in arid regions are locally migratory. Its habitat is dry deciduous forests, where it is mostly solitary. It is called Hawk-cuckoo as it resembles a sparrow hawk....
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.