Trogón de Borneo

Identificación

Like most trogons, Whitehead's trogon is sexually dimorphic; the male is considerably more colourful than the female. It ranks among Borneo's largest trogons, measuring 29 to 33 cm (11 to 13 in) in length. The male is crimson on the forehead, crown, nape, and sides of the head, with bare blue skin around the eyes. The rest of his upperparts are cinnamon-brown. His throat is black, shading into a grey breast, but the rest of his underparts are crimson. His wings are primarily black, with fine white barring on the secondaries and coverts. His tail is mostly white underneath; above, the two central tail feathers are cinnamon with a broad black tip, and the remaining tail feathers are primarily black. The outermost tail feathers are white on the terminal half and along the outer web. He has a blue beak, pinkish-brown legs and feet, and reddish-brown irises. The female is similarly patterned, but duller, with cinnamon-brown replacing the crimson of the male. The barring on her secondaries and wing coverts is cinnamon-brown rather than white. The immature female is similar to the adult female, but her entire ventral side is uniformly coloured, lacking the adult's black throat and grey upper breast. She also has less blue colouring on her beak. <p>Whitehead's trogon vocalises only rarely. Its song is a loud series of four to five harsh, slow notes, evenly pitched and variously transcribed as "kwau kwau kwau kwau", "wark wark wark wark", or "poop poop poop poop". It also has a rolling "burr" call, which is sometimes followed by a loud, descending "kekekeke".

Taxonomía

English ornithologist Richard Bowdler Sharpe first described Whitehead's trogon for science in 1888, using a specimen collected on Mount Kinabalu, in the Malaysian state of Sabah. He gave it the scientific name Harpactes whiteheadi, assigning it to the genus containing other Asian trogons. There are no subspecies. Molecular studies indicate that it is most closely related to the Philippine trogon.<p>The genus name Harpactes is a transcription of the Greek word harpaktes, meaning "robber". The species and common names honour the British explorer John Whitehead, who first collected the bird.

Nombre científico

Harpactes whiteheadi

Autoridad

Sharpe, 1888

Orden

Trogoniformes

Familia

Trogónidos

Género

Harpactes

Distribución y hábitat

Whitehead's trogon is endemic to the island of Borneo, where it occurs in mountainous areas between 900 and 2,000 metres (3,000 and 6,600 ft) in elevation. Restricted to primary forest, it favours damp valleys. It is an uncommon and poorly-known resident species.

Migración

Especie residente

Comportamiento

Patrón migratorio: Especie residente.

Conservación

Tendencia poblacional: en declive.

Tendencia poblacional

en declive