Nyctimystes avocalis

Nyctimystes avocalis or the loud big-eyed tree frog is small frog from Papua New Guinea. It lives in wetlands far from the ocean. The IUCN Red List of Threatened Species says it is vulnerable to extinction.
As of the 1950s, this frog had only been seen on eastern Goodenough Island, about 900 meters above sea level.
The male frog is about 35 mm long from nose to rear end. The frog is gray with brown patches on its back.