This species is known from southwestern Ecuador, where it occurs in Manabi, El Oro, Guayas, and Loja Provinces. It has an altitudinal range of 0-530m asl.
Habitat and Ecology
It can be found in scrub savannah, Pacific tropical forest and equatorial dry forest. This species can be found in areas of human-modified habitat (QCAZ database). This is an explosive breeder, laying eggs in a foam nest in temporary pools.
It can be abundant during reproductive bouts (recorded in 2002).
The main threats are habitat loss owing to agricultural expansion and human settlement. It is reasonably adaptable, but probably cannot withstand very serious habitat degradation.
It occurs in Machililla National Park in Ecuador.
In the Duovox clade of Ron et al. (2006). This species is currently under taxonomic revision. The Peruvian population pertains to a different, but closely related species (Ron et al. 2006).
Ariadne Angulo, Luis A. Coloma, Santiago Ron, Diego Almeida, Fernando Nogales, Diego Cisneros-Heredia, Pablo Venegas 2010. Engystomops pustulatus. In: IUCN 2014