About Zhangixalus owstoni (Stejneger, 1907)
Zhangixalus owstoni, commonly known as Owston's green tree frog, is a species of frog in the family Rhacophoridae that is endemic to Japan. Its natural habitats include subtropical or tropical moist lowland forests, subtropical or tropical seasonally wet or flooded lowland grassland, intermittent freshwater marshes, and irrigated land. This species is currently threatened by habitat loss, though its overall population remains stable. Adult male frogs measure approximately 42 to 51 millimeters in snout-to-vent length, while adult female frogs measure 50 to 67 millimeters. The feet of this frog do not have extensive webbing. While it can survive in a range of habitats, Zhangixalus owstoni prefers forests and an arboreal lifestyle. During the breeding season, these frogs move to grasslands and wetlands to reproduce. The species has been observed at elevations between 20 meters and 450 meters above sea level. The International Union for Conservation of Nature classifies this frog as near threatened. The island chain where the species is endemic experienced major changes during and after World War II. Its range includes one protected area: Iriomote Ishigaki National Park on Iriomote Island. On other islands within its range, habitat degradation occurs primarily through the conversion of land for agricultural use.
