White-mantled bearded bird
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White-mantled bearded bird ( Capito hypoleucus ) |
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| Capito hypoleucus | ||||||||||
| Salvin , 1879 |
The white-mantled bearded bird ( Capito hypoleucus ) is a species from the American bearded bird family . The species occurs exclusively in a very small and meanwhile highly fragmented area in northwest South America. The IUCN classifies the white coat Barbet due to its habitat loss as endangered ( endangered ) a. The population is estimated to be fewer than 10,000 individuals. There are three subspecies.
Appearance
The white-mantled bearded bird is a sturdy little bird with a short, powerful beak. The body length is about 19 centimeters. The males of the nominate form have a wing length of 8.7 to 9.6 centimeters. The tail measures 5.4 to 5.7 inches and the beak length is 2.2 to 2.6 inches. Females have similar body measurements. In contrast to other bearded beards, the sexual dimorphism in this species is only very slightly pronounced.
The males of the nominate form have a bright red forehead; from the middle of the skull to the nape of the neck the feathers have a black base and a pale yellow-white tip. This bright drawing runs out on the coat in a V-shape. The rest of the upper body is black, the control feathers are dark brown. The chin and throat are creamy white, and a wide, pale brown band runs across the front chest. The rest of the breast as well as the belly and under tail covers are yellow-white, the sides of the body and the flanks are also yellow-white. The legs are olive gray, with the feathers having small yellow-white tips. The subspecies C. h. extinctus differs from the nominate form by a darker chest band. The subspecies C. h. carrikeri is a little more yellow on the underside of the body.
From the other American bearded birds, whose distribution areas overlap with that of the white-coat bearded bird, the white-coat bearded bird can be distinguished mainly by the lack of black areas on the underside of the body. The greatest resemblance is to the teardrop-whiskered bird , which however has a darker beak and no red markings on its head.
Distribution area
The white-mantled bearded bird is only found in northern Colombia. In the last few years there have only been documented observations from the south-east of Antioquia and the north of Calda . This corresponds to the southern distribution region of this species. The increasing deforestation of the existing forests has a negative effect on the stock. It is estimated that more than half of the original range no longer offer the white-mantled bearded bird suitable habitats. The population is increasingly fragmented.
Habitat and way of life
The white-mantled bearded bird mainly inhabits mountain slopes at altitudes between 700 and 1600 meters. It originally occurred in moist mountain forests, it also uses areas in which agricultural areas with a maximum extension of up to 20 hectares have been felled in the forest. It is also observed in secondary forests and coffee and cocoa plantations, provided these have fruit-bearing trees. In some cases it also uses mountain forests on very steep slopes that are less suitable for use as agricultural land. The species can possibly be saved from extinction if such areas of at least 1,000 hectares are placed under protection and connected to other such forest areas by corridors.
The white-coat bearded bird is usually seen in pairs and small family groups. Occasionally, several pairs are seen foraging for food in an isolated fruit-bearing tree up to one kilometer from the edge of the forest. While foraging, they are mostly in the treetops. They mainly eat fruit, including mangoes and, to a lesser extent, insects. Reproductive biology is largely unexplored. Presumably white-coat bearded birds breed in the months May to June.
supporting documents
literature
- Lester L. Short and Jennifer FM Horne: Toucans, Barbets and Honeyguides - Ramphastidae, Capitonidae and Indicatoridae. Oxford University Press, Oxford 2001, ISBN 0-19-854666-1 .
Individual evidence
- ↑ BirdLife factsheet on the Weißmantel-Bartvogel , accessed on January 23, 2011
- ↑ Short et al., P. 294
- ↑ Short et al., P. 293
- ↑ Short et al., P. 294
- ↑ Short et al., P. 295
Web links
- Capito hypoleucus inthe IUCN 2013 Red List of Threatened Species . Listed by: BirdLife International, 2012. Retrieved September 5, 2013.