Val Verde Co., Texas. May 23, 1997.
On my first trip to west Texas, I heard large numbers of these plain little frogs calling in the roadside ditches of west Texas – their call is like a high-pitched sheep bleating. The top photo is an olivacea from Brewster Co., Texas, and the bottom frog is from Elk Co., Kansas.
My Flickr album for this species is here.
HerpMapper records for this species are here.