Rhinella lescurei is only known from French Guiana, i.e. the southwestern (Haute Wanapi and Mitaraka), central (Saül), western (Litany) and northeastern portions (Cisame camp on Approuague river, Pararé station on Aratai river). Localities range from 20 to 170 masl. The species probably occurs in southeastern Suriname and Brazilian areas adjacent to French Guiana and Suriname. Preliminary results of an analysis of genetic data spanning the distribution of the R. margaritifera group suggest that this taxon could be endemic to the Guianan Shield (Fouquet et al., 2007).
Habitat and Ecology
This species can be found in pristine lowland primary rainforest; males are often found near the banks of a permanent river (A. Fouquet, pers. comm. 2008). During the rainy season (from November to January and from March to May), males call during day time within 10 meters of slowly running water. Calling males are usually isolated from each other and perched between 0.3 and 1 m high on a vine, dead trunk or root (Fouquet et al., 2007).
This species appears to be rare; however, its range is still poorly known and data are still insufficient to provide a more reliable estimate of its population status (A. Fouquet, pers. comm. 2008).
The region occupied by this species is quite pristine, but regional threats are clearing and gold mining (A. Fouquet, pers. comm. 2008).
No conservation measures are currently known for this species.
In the Rhinella margaritifera group according to the original publication. Rhinella lescurei can be distinguished from other similar species by a combination of morphological and vocalization features (Fouquet et al., 2007).
Antoine Fouquet 2008. Rhinella lescurei. In: IUCN 2014