Highly variable and can change colors, but usually shades of green and/or gray. Toe pads sticky. Skin granular. Inside of legs bright yellowish-orange. White spot under eye. Call a pulsating trill. 
Species: H. chrysoscelis (Cope’s Gray Treefrog) and H. versicolor (Gray Treefrog)
Arkansas Herpetological Atlas 2019
This species is represented by 1,087 records from 38 sources: 887 museum (
), 0 literature (
), 0 research (
), and 150 observation (
), with 50 additional Trauth et al. (2004) locality points remaining unsourced (
). It has been museum vouchered for 70 of 75 counties (), with 4 additional counties having other forms of reported occurrence (). Years of collection range from 1890 to present.
The range extents and areas of sympatry in this species complex are poorly resolved in Arkansas, with H. versicolor (■) occupying the northwest corner of the state and H. chrysoscelis (■) throughout the remainder of the state. The occurrence of H. versicolor south of the Arkansas River and into the Ouachita Mountains (D. B. Shepard, J. D. Chamberlain, pers. obs.) is based on limited evidence. An isolated record of H. versicolor in the Mississippi River floodplain, based on the average nuclear diameter of eyelid cells (Chaffin and Trauth, 1987), warrants further confirmation; currently symbolized as an isolated, unsourced Trauth et al. (2004) locality point. Call surveys would be helpful in refining the distributions of these species, with H. chrysoscelis calls having almost twice the pulse rate as H. versicolor (Harrison, 2016).
