Speckled Chachalaca

Speckled Chachalaca
In Pelotas, Rio Grande do Sul, Brazil
Conservation status
Least Concern (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Galliformes
Family:	Cracidae
Genus:	Ortalis
Species:	O. guttata
Binomial name
Ortalis guttata Spix, 1825
Subspecies
O. g. araucuan (Spix, 1845) East Brazilian Chachalaca O. g. guttata (Spix, 1825) Speckled Chachalaca O. g. squamata (Lesson, 1829) Scaled Chachalaca O. g. subaffinis (Todd, 1932)

The Speckled Chachalaca (Ortalis guttata) is a species of bird in the Cracidae family. It is found in forests and woodlands in the western Amazon Basin and disjunctly in the Atlantic forests in eastern Brazil. 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.

Taxonomy

Several taxa here included as subspecies of the Speckled Chachalaca have been considered valid species instead; 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^[1] (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 araucuan and 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.

Status

It is common in large parts of its Amazonian range, and while it remains locally fairly common in eastern Brazil, it has suffered due to the extensive habitat destruction in this region. Nevertheless, its tolerance of disturbed habitats combined with its relatively small size makes it far less vulnerable than e.g. the related curassows.

References

1. ^ (Portuguese) CBRO. retrieved October 27, 2008

• BirdLife International 2006. Ortalis guttata. 2006 IUCN Red List of Threatened Species. Downloaded on 10 July 2007.