| 词条 | Speckled chachalaca |
| 释义 |
|image = Ortalis guttata, Speckled Chachalaca.jpg | name = Speckled chachalaca | status = LC | status_system = IUCN3.1 | status_ref = [1] | genus = Ortalis | species = guttata | authority = Spix, 1825 }} The speckled chachalaca (Ortalis guttata) is a species of bird in the family Cracidae. It is found in forests and woodlands in the western Amazon Basin. It has distinct white scaling/spotting on the lower neck and chest, but otherwise it resembles other chachalacas, it being vaguely pheasant-like (though far more arboreal and social), and with an overall brown plumage. TaxonomySeveral taxa formerly included as subspecies of the speckled chachalaca have been considered valid species: the scaled chachalaca (O. squamata Lesson, 1829) in south-eastern Brazil, and the East Brazilian chachalaca (O. araucuan Spix, 1825) in eastern Brazil. The last of these has also been referred to as the Brazilian chachalaca or the white-bellied chachalaca, although the former arguably is problematic as numerous other chachalacas are found in Brazil, while the latter leads to easy confusion with the Central American Ortalis leucogastra. Alternatively, "araucuan" and "squamata" have been included as subspecies of the little chachalaca[2] (the connection between the Guiana Shield and Atlantic forest is known from several other birds, e.g. the buff-throated woodcreeper and the yellow-green grosbeak). Both O. araucuan and O. squamata were originally described as valid species, but – without reason – changed to subspecies of O. guttata. Nevertheless, they all have white scaling/spotting on the lower neck and chest, thus resembling the Amazonian nominate group (incl. "subaffinis"), and most recent authorities continue to treat all as subspecies of O. guttata. The Colombian chachalaca (O. columbiana Hellmayr, 1906) was formerly considered a subspecies in this group, but is now recognized as a separate species by the South American Classification Committee of the AOU and the IOC. StatusIt is common in large parts of its Amazonian range. Nevertheless, its tolerance of disturbed habitats combined with its relatively small size makes it far less vulnerable than, for instance, the related curassows. References1. ^{{IUCN|id=22678334 |title=Ortalis guttata |assessor=BirdLife International |assessor-link=BirdLife International |version=2013.2 |year=2013 |accessdate=26 November 2013}} {{Taxonbar|from=Q1266317}}{{DEFAULTSORT:chachalaca, speckled}}2. ^{{cite web |language=Portuguese |title=Resolução Nº 36 – Excluir Ortalis araucuan (Spix, 1825) da lista principal de aves brasileiras, incorporando-a a Ortalis guttata (Spix, 1825). |url=http://www.cbro.org.br/CBRO/explica/ort_gut.htm |publisher=CBRO |accessdate=October 27, 2008}} 8 : Chachalacas|Birds of the Amazon Basin|Birds of the Colombian Amazon|Birds of the Venezuelan Amazon|Birds of the Ecuadorian Amazon|Birds of the Peruvian Amazon|Birds described in 1825|Taxonomy articles created by Polbot |
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