Bradypus tridactylus


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Bradypus tridactylus
Species Authority: Linnaeus, 1758
Common Name/s:
English Pale-throated Three-toed Sloth, Pale-throated Sloth

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2010-05-27
Assessor/s: Chiarello, A. and Moraes-Barros, N.
Reviewer/s: Abba, A.M. & Superina, M.
Contributor/s: Moraes-Barros, N.
Bradypus tridactylus is listed as Least Concern in view of its wide distribution in one of the most pristine areas of the Amazon basin, and its having been recorded as locally relatively abundant.
2006 Least Concern (IUCN 2006)
2006 Least Concern

Geographic Range [top]

Range Description: B. tridactylus occurs in the Guyana Shield region, from Venezuela south of the Orinoco (although its distribution crosses at the delta region) into northern Brazil (south to the Amazonas/Solimões), through to Guyana, Suriname and French Guiana. It does not occur south of the Amazon river.
Brazil; French Guiana; Guyana; Suriname; Venezuela, Bolivarian Republic of
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Population density estimates vary from 1.7 animals per km² in French Guiana (Taube et al. 1999) to 221 animals per km² in Manaus, Brazil (Chiarello 2008).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Bradypus tridactylus is found in lowland and montane tropical moist forest. It has been recorded on tepuis (table-top mountains). Adult sloths are dark coloured with black spots on shoulders, back and haunches. The head and throat are yellow. Males can be distinguished from females by their dorsal orange-yellow patch with a broad black central line (Hayssen 2009). Both males and females reach reproductive age at three to six years. A single young is born after a gestation of six months (Taube et al. 2001).
Systems: Terrestrial

Threats [top]

Major Threat(s): There are no major threats to this sloth species.

Conservation Actions [top]

Conservation Actions: Bradypus tridactylus has been recorded from many protected areas.
Citation: Chiarello, A. and Moraes-Barros, N. 2011. Bradypus tridactylus. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <>. Downloaded on 21 April 2014.
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