A few photos and videos of singing Gray Treefrogs observed in Cuyahoga County, Ohio in May 2019.
A Gray Treefrog sings from a perch on a tree hanging over a pond.
And here is a video of the male calling from a tree:
One male Gray Treefrog chases another male out of his territory. The dominant male is on the left, and the retreating male is on the right of the photo.
Despite their name, Gray Treefrogs often have a green color. Here, the green color of a calling male Gray Treefrog contrasts with the tan color of the dead cattail branches he is perching on.