||Lentino & Restall, 2003
||SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.
||Recent mitochondrial genetic data show that the genus Amaurospiza is not a member of the Emberizidae and instead indicate strong support for placement in the Cardinalidae (AOU 2009, SACC 2008).
||12 cm. Male is glossy blue-black with sooty black wings and brighter blue shoulder. Underwing coverts and axillars are white. Bill is large, deep and conical, dark grey. Female is light buff-brown with an olive-grey bill. Similar spp separable from other Amaurospiza by the denisty of colouration and black flammulations on the breast as well as overall size.
|Red List Category & Criteria:
||Ascanio, D., Freile, J., Lentino, M. & Restall, R.
||Bird, J., Butchart, S., Calvert, R., Sharpe, C J, Symes, A. & Ashpole, J
This species, described in 2003, was known from a single location where its habitat has now been destroyed. It was subsequently found at several locations near to the type locality, and believed to have an extremely small population occupying a tiny range. Further surveys suggest that its range and potential population may be higher than initially suspected, but for the present it is maintained as Critically Endangered. With increased knowledge of the range and potential population of this species it is probable that it may be downlisted.
|Previously published Red List assessments:|
- 2013 – Critically Endangered (CR)
- 2012 – Critically Endangered (CR)
- 2010 – Critically Endangered (CR)
- 2009 – Critically Endangered (CR)
- 2008 – Critically Endangered (CR)
- 2007 – Critically Endangered (CR)
- 2006 – Not Evaluated (NE)
- 2004 – Not Recognized (NR)
- 2000 – Not Recognized (NR)
- 1994 – Not Recognized (NR)
- 1988 – Not Recognized (NR)
|Range Description:||This species was recently described following collection of the holotype on Isla Carrizal in the Río Caroní, Venezuela. Since then habitat at the type locality on the island has been destroyed in the development of Guri Dam. Surveys in late 2007 and 2008 recorded the species in seven areas in the lower Caroní basin (M. Lentino in litt. 2008), and further fieldwork increased the number of known sites to fourteen (M. Lentino in litt. 2010). For the moment, it is assumed to have an extremely small population and to be declining as other potentially suitable habitat continues to be destroyed. However, the low number of records may be partly due to the difficulty in surveying its habitat, which as a result has rarely been explored. Some 2,482 km2 of suitable spiny bamboo habitat has been mapped (M. Lentino in litt. 2010).|
Venezuela, Bolivarian Republic of
|♦ Continuing decline in area of occupancy (AOO):||Yes|
|♦ Extreme fluctuations in area of occupancy (AOO):||No||♦ Estimated extent of occurrence (EOO) - km2:||1|
|♦ Continuing decline in extent of occurrence (EOO):||Yes||♦ Extreme fluctuations in extent of occurrence (EOO):||No|
|♦ Number of Locations:||1||♦ Continuing decline in number of locations:||Yes|
|♦ Extreme fluctuations in the number of locations:||No||♦ Lower elevation limit (metres):||95|
|♦ Upper elevation limit (metres):||1600|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Although it has now been found at several localities since destruction of the type locality, the global population is nevertheless assumed to be tiny, with fewer than 50 individuals and mature individuals.|
Trend Justification: Habitat at the type locality, Isla Carrizal, was destroyed and then flooded during the Guri Dam development, and this development destroyed other potentially suitable habitat, therefore the species's population is suspected to be declining, although the likely rate of decline has not been estimated. However, a significant proportion of its habitat is pristine, far from roads and unlikely to be under any threat (M. Lentino in litt. 2010).
|Current Population Trend:||Decreasing|
|♦ Number of mature individuals:||1-49||♦ Continuing decline of mature individuals:||Yes|
|♦ Extreme fluctuations:||No||♦ Population severely fragmented:||No|
|♦ No. of subpopulations:||1||♦ Continuing decline in subpopulations:||Unknown|
|♦ Extreme fluctuations in subpopulations:||No||♦ All individuals in one subpopulation:||Yes|
|♦ No. of individuals in largest subpopulation:||100|