Japanese Tree Frog

The Japanese tree frog is a small, smooth-skinned frog with adhesive toe pads. It is usually bright green but can turn grey or brown, and a dark stripe runs from the snout through the eye toward the shoulder. The underside is pale and granular. The combination of toe discs, changing green colour and a clean dark eye stripe distinguishes it from the brown, ground-dwelling Rana frogs occurring farther across northern Asia. (Wikipedia, Japanese tree frog account)

This tree frog uses wet meadows, ponds, rice fields, river margins and woodland edge in East Asia. It climbs low vegetation, calls mostly after dark and feeds on small insects. During breeding, males gather at shallow water and females deposit eggs that hatch into aquatic tadpoles. Adults overwinter on land in sheltered places. Mongolia lies at the edge of the listed range, but the opened general account did not provide a national locality or Mongolian breeding dates, so neither is supplied. (Wikipedia, Japanese tree frog account)