Mindanao hooded eagle
| Mindanao hooded eagle | ||||||||||||
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| Nisaetus pinskeri | ||||||||||||
| ( Preleuthner & Gamauf , 1998) |
The Mindanao boned eagle ( Nisaetus pinskeri ) is a species of raptor belonging to the genus Nisaetus . It occurs in the Philippines . The Art epithet honors the Austrian evolutionary geneticist Wilhelm Pinsker from the Natural History Museum Vienna .
features
The Mindanao bonnet eagle reaches a size of 54 to 61 cm and a weight of 1200 g. Its hood consists of four to five black feathers that are up to 8 cm long. The head is brown to dark olive-yellow-brown and dotted with different black lines. The top, upper wings and tail are dark brown. The tail has four or five narrow dark bands. The throat is solid white, except for a black central stripe with different openings. The upper chest is dashed in black. The rest of the underside varies from ocher to rust-brown or yellow-brown-olive with protruding black lines. The lowest area of the underside and the fletching of the trousers are closely banded brown, black and white. The iris is bright chrome yellow. The beak and the wax skin are black. The legs are yellow. The Mindanao- hooded eagle differs from the Philippine crested eagle ( Nisaetus philippensis ) by its slightly smaller size and slightly lighter plumage, with the lower underside being densely banded. The sexes are similar. The males are smaller than the females. The plumage of juvenile birds is much lighter than that of adult birds. Their heads and necks are white, apart from the black reins and long black bonnet. Towards the top, the color gradually becomes mouse gray and light brown. The upper tail coverts are white. The upper wings and the tail are colored gray-brown, similar to the back. The wings of the hand are black. All hand and arm wings have seven to nine rather narrow light bands. The light-colored small and medium-sized wing covers form a broad band when the wings are open. The tail has six to seven bands arranged at regular intervals. The whiteness of the head continues over the entire underside, sometimes with darker flanks. The feathered legs have fine, bright yellow-brown bandages. The end band is sometimes wider. The non-feathered parts of the body correspond in color to the adult birds, except for the dark gray eyes, which only turn yellow in the almost adult plumage.
Vocalizations
The call of the Mindanao hooded eagle is similar to that of the Philippine hooded eagle. It's two-syllable and sounds like "wheee-whit".
distribution
The Mindanao boned eagle occurs on the islands of Samar , Biliran , Negros , Bohol , Siquijor , Mindanao and Basilan in the central region and in the south of the Philippines.
Habitat and way of life
The Mindanao-hooded eagle inhabits mature forests in the lowlands and in the low mountain ranges. In the mountains it occurs in moss forests at altitudes up to 1900 m. It hunts from hidden waiting areas in the canopy and presumably feeds on birds. Most often you can see him at the edge of the forest or floating above the forest. No information is available on its reproductive behavior.
Systematics
The Mindanao- hooded eagle was described in 1998 as a subspecies of the Philippine hooded eagle ( Spizaëtus philippinsis [sic] pinskeri ). According to a molecular study from 2005, the taxon received species status. This was accepted in 2008 by the IOC Checklist, 2011 by the Clements Checklist, 2013 by the Howard & Moore Checklist and in 2014 by BirdLife International and the IUCN, which put the Mindanao Boned Eagle in the “endangered” category in the Red List of Endangered Species.
Individual evidence
- ↑ Preleuthner, M. and Gamauf, A .: A possible new subspecies of the Philippine Hawk-eagle ( Spizaetus philippensis ) and its future prospects. . (PDF) In: Journal of Raptor Research . 32, No. 2, 1998, pp. 126-135.
- ↑ Gamauf A, Preleuthner M & W. Pinsker: Distribution and field identification of Philippine birds of prey: 1. Philippine Hawk-Eagle (Spizaetus philippensis) and Changeable Hawk Eagle (Spizaetus cirrhatus) . (PDF) In: Forktail . 14, 1998, pp. 1-11.
- ↑ Gamauf A, Gjershaug JO, Rov N, Kvaly K and Haring E: Species or subspecies? The dilemma of taxonomic ranking of some South-East Asian hawk-eagles (genus Spizaetus) . In: Bird Conservation International . 15, 2005, pp. 99-117. doi : 10.1017 / S0959270905000080 .
- ↑ Haring, E., Kvaløy, K., Gjershaug, J.-O., Røv, N. & Gamauf, A. (2007) Convergent evolution and paraphyly of the hawk-eagles of the genus Spizaetus (Aves, Accipitridae) - phylogenetic analyzes based on mitochondrial markers . Journal of Zoological Systematics and Evolutionary Research 45 (4): 353-365.
literature
- Ferguson-Lees, James & David A. Christie 2001: Raptors of the world . Helmet, london.