Another well hidden tree frog

This is a gray treefrog. But is it Hyla versicolor or H. chrysoscelis? Apparently, the 2 species can be distinguished only from their calls. I need to get a sound recording device and then go out there one night to record their calls.

I photographed this individual in the park near my house. The previous well hidden treefrog from the same location was the subject of this post.