This species occurs in Amazonian Brazil, northern Bolivia and southeastern Peru, from 10 to 999 m elevation (Funk et al. 2008).
Habitat and Ecology
Engystomops freibergi can be found in lowland Amazon rainforest. It is usually found amidst the leaf litter in primary forest. A nocturnal species, males call at night from the leaf litter in the vicinity of temporary ponds and slow-moving streams. The breeding period coincides with the rainy season (December-March), during which time foam nests are deposited on the surface of ponds (A. Angulo pers. comm. 2008).
This species varies from rare to common in several localities of Madre de Dios, southeastern Peru (A. Angulo pers. comm. 2008).
No major threats are known for this species, although some populations could be affected by local deforestation outside of protected areas (A. Angulo pers. comm. 2008).
The species is known to occur within established protected areas (e.g. Tambopata National Reserve, Manu National Park, both in Peru) (A. Angulo pers. comm. 2008).
Red List Status
Least Concern (LC)
Listed as Least Concern in view of its likely wide distribution, occurrence in an area where its habitats are not significantly threatened, presumed large population, and because it is unlikely to be declining to qualify for listing in a more threatened category.
In the Edentulus clade of Ron et al. (2006). A recent study (Funk et al. 2007) suggests that this taxon corresponds to a well-supported southwestern Amazon clade. Morphometric and all parameter differences allow for discrimination between this species and the closely related Engystomops (was Physalaemus) petersi (Funk et al. 2008).
Angulo, A. 2010. Engystomops freibergi. The IUCN Red List of Threatened Species 2010: e.T136155A4252119. http://dx.doi.org/10.2305/IUCN.UK.2010-2.RLTS.T136155A4252119.en .Downloaded on 15 December 2018