Rhinella tacana is only known from two close localities, Huairuro (14 19'28.2'' S, 68 05'36.1'' W), and Arroyo Huacataya (14 20'12.1" S, 68 5'57.3" W), at ca 1500 masl, path from San José de Uchupiamonas to Apolo, Serranía Eslabón, Madidi National Park, Franz Tamayo Province, Department of La Paz, Bolivia (Padial et al., 2006).
Habitat and Ecology
This species inhabits primary humid montane forest with high abundance of arboreal ferns, bromeliads and other epiphytes. Potentially flooded flat surfaces are almost inexistent but there are some small streams. Rhinella tacana is a nocturnal species that can be found active on leaves of bushes or on the trunk of trees from 1–4 m height. It climbs vertical trunks covered by moss. The adult female presents convoluted oviducts and small white ova. The call, tadpole and reproductive mode are unknown. Other anuran species that occur in the area are Atelopus tricolor, Ameerega boliviana, Hyalinobatrachium bergeri, Hyloscirtus armatus, Hypsiboas balzani, Pristimantis danae and P. madidi (Padial et al., 2006).
The species may be rare or perhaps moderately common (I. De la Riva, pers. comm. 2008).
No major threats are known for this species.
The species is found within the boundaries of Madidi National Park (Padial et al., 2006).
In the Chaunus veraguensis group according to the original publication. In the genus Rhinella following Chaparro et al. (2007). Rhinella tacana can be distinguished from other similar species by a combination of morphological features and colour patterns (Padial et al., 2006).
Ignacio De la Riva 2008. Rhinella tacana. In: IUCN 2014