This species is known from 25-500 m asl in far north-western Panama and western Costa Rica, from the Golfo Dulce area, north to the Rio Baru near Dominical.
Habitat and Ecology
Adults seem to be restricted to forested habitats from tree plantations to primary forest, but reproduction can occur in highly degraded habitats (F. Bolaños pers. comm.). They breed in streams and rivers during the dry season (Mid-December to March), being uncommon but still reproductive at the end of the dry period (April) (Savage 2002, O'Neill and Mendelson 2004, F. Bolaños and G. Chaves pers. comm.). The breeding stream requirements appear to be a wide, low-gradient, gravel or rocky stream with small isolated pools with sun exposure.
It is a very abundant species (F. Bolaños and G. Chaves pers. comm. 2007). The Costa Rican sub-population is thought to be stable (G. Chaves pers. comm. 2015).
There appear to be no major threats to this adaptable species (F. Bolaños and G. Chaves pers. comm.).
This species was previously identified as Incilius melanochlorus (O'Neill and Mendelson 2004).
IUCN SSC Amphibian Specialist Group 2015. Incilius aucoinae. In: IUCN 2014