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There are no known blue pigments in bird feathers or skin. These blues are called structural colors because they are created by the way light interacts with surfaces and spaces on a microscopic scale. Sexual …

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author’s life plus 70 years or …

Due to ongoing habitat loss, limited range and overhunting in some areas, the Goldie’s bird-of-paradise is evaluated as Vulnerable on the IUCN Red List of Threatened Species. Endemic to …

In the places where they are sympatric, Stephanie’s astrapia rather frequently hybridizes with the ribbon-tailed astrapia. The hybrid offspring has been called “Barnes’s astrapia”. This form of astrapia …

Vogelkop superb bird-of-paradise lives alone, except for the breeding and mating season. Kidadl …

A common species in its limited habitat range, the curl-crested manucode is evaluated as Least Concern …

In this respect it is interesting to note that Clench concluded that the increasing complexity of the tracheal loops …

They lack the brightness and plumes but have the same overall effect. The yellow pigment of the Twelve-wired Bird-of-Paradise turns white after death and also in captivity without a …

Although the female was silent, the territory-holding male sang daily for more than 6 months each year. The male performed an inverted nuptial display on a sapling near his regular song …

The exact number of their population within their distribution range is unknown. The last king of Persia commemorated the name of the emperor bird-of-paradise in 1888. This is also they …