Nakhon Ratchasima Province, Thailand. February 26, 2016
I observed these frogs while stream-walking at night, and one sandy bank in particular had dozens of them. They look something like microhylids back home in North America, except these have long and well-developed hind legs.
My Flickr album for this species is here.
My Thailand Flickr album is here.
HerpMapper records for this species are here.