Cercomacra carbonaria

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	AVES	PASSERIFORMES	THAMNOPHILIDAE

Scientific Name:

Cercomacra carbonaria

Species Authority:

Sclater & Salvin, 1873

Common Name/s:

English

–

Rio Branco Antbird

Assessment Information [top]

Red List Category & Criteria:

Near Threatened ver 3.1

Year Assessed:

2008

Assessor/s:

BirdLife International

Reviewer/s:

Mahood, S., Butchart, S.

Contributor/s:

Vale, M., Silveira, L., Whittaker, A.

Justification:
This species has a moderately small population along one river and its tributaries within a small range. However, research has substantially increased its range and population estimate in recent years, causing it to be downlisted to Near Threatened. The combination of low-level conversion to agriculture and widespread fires has probably resulted in habitat loss and some population declines. However, the range is not yet severely fragmented or restricted to few locations.

History:

2004	–	Vulnerable
2000	–	Vulnerable
1996	–	Vulnerable
1994	–	Vulnerable

Geographic Range [top]

Range Description:	Cercomacra carbonaria is limited to middle sections of the rio Branco and some of its tributaries in Roraima, extreme north Brazil, and adjacent Guyana. It ranges from Caracarai in the south, along the rio Branco and rio Tacutu to the Ireng river in Guyana, less than 2 km from its confluence with the rio Tacutu². It has been found on the rio Mucajaí, and also along the rio Parime and the rio Uraricoera^3,4. Given the recent increase in reords from a wider geographic area the estimated extent of available habitat has been increased to 723 km², it is fairly common within this range, (c.80 individuals per km²) extrapolations indicate that the population is c.15,000 individuals⁴.
Countries:	Native: Brazil; Guyana
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	Vale et al extended the range to 723km2, assuming 80 individuals per km2 gives c.15,000 individuals.
Population Trend:	Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	On the mainland, it apparently only occurs in dense thickets along the river edge, where suitable habitat is restricted to within 0.5 km² of the rivers². On Ilha São Jose, it largely inhabits interior, densely wooded forest, with trees 20-30 m in height². It has also been found in dense second growth, consisting mostly of overgrown manioc plantations with widely scattered, 20-30 m trees². The diameter of territories is 100-150 m, and breeding is probably in the wet season².
Systems:	Terrestrial; Freshwater

Habitat and Ecology:

On the mainland, it apparently only occurs in dense thickets along the river edge, where suitable habitat is restricted to within 0.5 km² of the rivers². On Ilha São Jose, it largely inhabits interior, densely wooded forest, with trees 20-30 m in height². It has also been found in dense second growth, consisting mostly of overgrown manioc plantations with widely scattered, 20-30 m trees². The diameter of territories is 100-150 m, and breeding is probably in the wet season².

Systems:

Terrestrial; Freshwater

Threats [top]

Major Threat(s):	There has been some conversion to agriculture, especially rice cultivation, and some trees in the gallery forest are selectively logged², but the major threat may be the burning of habitat. In 1998, c.75% of Ilha São Jose was burnt, and widespread fires in Roraima in 1999 probably had a severe impact on its river-edge habitats¹.

Major Threat(s):

There has been some conversion to agriculture, especially rice cultivation, and some trees in the gallery forest are selectively logged², but the major threat may be the burning of habitat. In 1998, c.75% of Ilha São Jose was burnt, and widespread fires in Roraima in 1999 probably had a severe impact on its river-edge habitats¹.

Conservation Actions [top]

Conservation Actions:	Conservation Actions Underway Surveys have clearly delimited the species's range^2,4, but no other measures have been taken. Conservation Actions Proposed Assess the impact of recent fires on the species. Protect river-island habitat, especially Ilha Boa Água and Ilha São Jose with adjacent gallery forest on the mainland.

Conservation Actions:

Conservation Actions Underway
Surveys have clearly delimited the species's range^2,4, but no other measures have been taken.

Conservation Actions Proposed
Assess the impact of recent fires on the species. Protect river-island habitat, especially Ilha Boa Água and Ilha São Jose with adjacent gallery forest on the mainland.

Citation:	BirdLife International 2008. Cercomacra carbonaria. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 04 February 2012.
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