Individuals of these two nearly identical species are distinguishable only by chromosome number (H. chrysoscelis is diploid, H. versicolor is tetraploid) and mating call (trill rate is faster in H. chrysoscelis).

Of medium size up to 6cm TL. There are two distinct species that are indistinguishable except for their calls or chromosome number (H. chrysoscelis is diploid, H. versicolor is tetraploid). Mating call (trill rate is faster in H. chrysoscelis). Large toepads, yellow colored inner thighs display a flash of color, pale spot under the eye. Color can vary as they can change color from soft whitish gray, to dark colors and green.