Ololygon heyeri is a species of frog in the family Hylidae.It is endemic to Brazil.Its natural habitats are subtropical or tropical moist lowland forests and rivers.It is threatened by habitat loss.
Sources
Oswaldo Luiz Peixoto, Bruno Pimenta . 2004 . Ololygon heyeri . 2004 . e.T55962A11401832 . 10.2305/IUCN.UK.2004.RLTS.T55962A11401832.en . 16 November 2021.
