| 翻訳と辞書 |
| Chestnut-throated huet-huet ： ウィキペディア英語版 |
Chestnut-throated huet-huet
The chestnut-throated huet-huet (''Pteroptochos castaneus'') is a large passerine bird of the Rhinocryptidae family. At an average mass of , it is, with the related black-throated huet-huet, the largest rhinocryptid and the third-heaviest tracheophone suboscine behind the giant and great antpittas.〔del hoyo, Joseph; Elliott, Andrew and Christie, David; ''Handbook of the Birds of the World: Volume 8 – Broadbills to Tapaculos''; p. 765. ISBN 9788487334504〕 It is a stockily-built bird, averaging in length〔 with a predominantly dark brown plumage except for a dark red throat and a pale buff bar on its wind – lacking in the Black-Throated species. For many decades intense debate existed as to whether these two were one species or two,〔Johnson, Alfredo William; ''The Birds of Chile and Adjacent Regions of Argentina, Peru and Bolivia'' (volune II), pp. 201-210.〕 but molecular studies in the 1990s demonstrated that the two species had been separated since before the Patagonian Ice Sheet first formed in southern Chile.〔Chesser, R. Terry; ‘Molecular Systematics of the Rhinocryptid Genus ''Pteroptochos''’; ''The Condor'', vol. 101, no. 2 (May 1999); pp. 439-446〕
The species is found in temperate forests of ''Nothofagus'' species and ''Austrocedrus chilensis''〔Meynard, Christine N.; Howell, Christine A. and Quinn, James F.; ‘Comparing alternative systematic conservation planning strategies against a politically driven conservation plan’; ''Biodiversity conservation'', 18 (2009); pp. 3061-3083〕 on the humid fringe of the Mediterranean climate zone of Chile, chiefly in Biobío, Maule and parts of O'Higgins Regions, and also in a small adjacent area of Neuquén Province in Argentina. The species sometimes occurs in exotic ''Pinus radiata'' plantations, but only if there is a dense understorey of shrubs, as it cannot move across habitat without dense understorey.〔Vergara, Pablo M. and Simonetti, Javier A.; (‘Abundance and movement of understory birds in a Maulino forest fragmented by pine plantations’ )〕 The Chestnut-Throated Huet-Huet feeds on insects and their larvae, and also a substantial number of seeds and fruit,〔Correa Rueda, Alejandro and Figueroa, Javier A.; ‘Observaciones de agresividad y territorialidad entre especies de ''Rhinocryptidae'' en un fragmento de bosque templado húmedo del sur de Chile’ (‘Observations of aggressiveness and territoriality among species of ''Rhinocryptidae'' in a rain forest fragment in Southern Chile’); ''Ornithologia Neotropical'', 14 (2003); pp. 121-125〕 which it digs for in the forest floor with its long claws. It may be important in the dispersal of certain forest plants.〔del Hoyo, Elliott and Christie; ''Handbook of the Birds of the World'' (volume 8); p. 758〕
Breeding occurs in spring between September and December, but the burrows ordinarily used to nest are dug during the winter rainy season when the soil is loosest.〔 The burrows can be as much as deep and contain two oval white eggs, which are very large for the bird’s size, typically averaging long and wide with a mass of . It is believed both sexes incubate the eggs (as is usual for tracheophone suboscines), but the incubation period is not documented.
The huet-huets are well known for their vocalisations, and the song of the chestnut-throated huet-huet is a series of resonant “hoots”〔Howell, Steve N.G. and Webb, Sophie; ‘Species status of the chestnut-throated huet-huet ''Pteroptochus castaneus''’; ''Bulletin of The British Ornithologists’ Club'', vol. 115 (1995), pp. 171-177〕 that unlike its more southerly counterpart, is typically given as a duet between pairs.〔 The song is higher, softer and faster than the black-throated species,〔 and the call is a “wehk, wehk, wehk” given in alarm.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Chestnut-throated huet-huet」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|