birds-of-paradise

birds-of-paradise are a family of passerine birds renowned for the extraordinary plumage and complex courtship rituals of the males. Primarily found in the rainforests of New Guinea and eastern Australia, the family Paradisaeidae comprises approximately 45 species across 17 genera. Their evolution represents a spectacular example of sexual selection, driven by female choice for increasingly elaborate male traits.

Description and taxonomy

The family exhibits extreme sexual dimorphism, with males of many species possessing iridescent plumes, elongated wires, and vibrant breast shields, such as those seen in the King of Saxony bird-of-paradise and the Wilson's bird-of-paradise. Early specimens reaching Europe, often prepared without feet by indigenous traders, fueled myths they were beautiful visitors from paradise. The family's taxonomy was formally established by Charles Lucien Bonaparte, with relationships clarified through modern studies like those by Edwin Scholes and Tim Laman. Key genera include *Paradisaea*, *Cicinnurus*, and *Manucodia*, the latter being more conservative in appearance. Their closest relatives are the crows and jays of the family Corvidae.

Distribution and habitat

The center of diversity is the island of New Guinea, including both Papua New Guinea and the Indonesian provinces of Papua and West Papua. Several species, like the Paradise riflebird and Victoria's riflebird, are endemic to the coastal rainforests of eastern Australia, particularly in Queensland and New South Wales. Their habitats range from lowland swamp forests to mid-montane cloud forests, with some species like the Black sicklebill inhabiting altitudes above 2,000 meters in the Central Range. The Aru Islands and certain islands in the Torres Strait also support isolated populations.

Behaviour and ecology

Male courtship displays are among the most elaborate in the animal kingdom, involving intricate dances, vocalizations, and the manipulation of their finery, as extensively documented by the Cornell Lab of Ornithology. Species like the Lawes's parotia perform on meticulously cleaned forest floor courts, while the Greater lophorina transforms its shape with a spectacular frontal shield. Most species are frugivorous, playing a crucial role in seed dispersal for forest trees like figs; some also consume arthropods and small vertebrates. Nesting duties are predominantly solitary female tasks, with clutch sizes typically small.

Relationship with humans

Their plumes have been central to the culture and trade of Highland peoples, used in ceremonial dress and as a traditional currency. During the 19th and early 20th centuries, demand for feathers for the millinery trade in Europe and North America led to intense hunting, famously opposed by conservationists like William Temple Hornaday. They have inspired numerous works, from the illustrations of John Gould to modern documentaries by David Attenborough for the BBC. The birds are national symbols, featured on the flag of Papua New Guinea and the Indonesian rupiah.

Conservation status and threats

While many species remain relatively secure, several are threatened by extensive habitat loss due to logging for commodities like palm oil and conversion for agriculture, particularly in the Indonesian half of the island. The deforestation rate in the region is among the highest globally. Species with restricted ranges, such as the Wahnes's parotia and the Goldie's bird-of-paradise, are classified as Near-threatened by the IUCN Red List. Sustainable ecotourism, as promoted by organizations like the World Wildlife Fund, and the establishment of protected areas such as Lorentz National Park are critical conservation strategies.

Category:Birds of New Guinea Category:Birds of Australia Category:Passerine families