This species is known from 32-92m asl in eastern Guayas Province, western Ecuador.
Habitat and Ecology
It occurs in dry lowland deciduous and semideciduous coastal forest, where the trees are usually under 20m in height and there can be a dense understorey of herbaceous plants. All the individuals were found in open areas where the natural vegetation had been partly or completely removed by humans. Males were found calling from ditches and small ponds (even as small as 10cm in diameter) in pasture, and in a flooded rice field. After mating, floating foam egg masses are deposited at these same sites.
It can be locally abundant.
More than half of the land cover in this region has been converted to agriculture or cattle pasture, but this species does appear to be reasonably adaptable.
The type locality at Cerro Masvale is a private, protected reserve adjacent to the Reserva Ecológica Manglares Churute.
In the Duovox clade of Ron et al. (2006).
Simon Stuart 2010. Engystomops guayaco. In: IUCN 2014