This species is known from Misiones and adjacent Corrientes provinces in northeastern Argentina, and from eastern Paraguay, and from Sao Paulo State and Rio Grande do Sul State, southeastern Brazil. It occurs from 70-500m asl.
Habitat and Ecology
This species occurs in littoral swamps and bordering fast moving streams in forests and grassland. It breeds in these streams and flooded grasslands. It has been recorded from some artificial waterbodies. It has also been recorded in secondary forest as well.
This is a common species in Paraguay and Argentina, but it is considered rare in Brazil.
Conversion of the land for agriculture is a major threat to this species in Paraguay and Brazil, in Argentina it is only threatened by the drying of streams caused by forest conversion to pine plantations.
In Paraguay the range of the species includes several protected areas. Conservation programs for the protection of high forest in eastern Paraguay and water sheds is needed. In Argentina it occurs in Iguazu National Park and in several provincial and private reserves.
This species was previously within the genus Hyla but has recently been moved to the resurrected genus Hypsiboas (Faivovich et al. 2005). The population in Sao Paulo might be a different species.
Norman Scott, Lucy Aquino, Axel Kwet, Dante Pavan, Esteban Lavilla, Diego Baldo 2004. Hypsiboas caingua. In: IUCN 2014