The Gray tree frog is common in the northern part of the U.S and southern parts of Canada. This tree frog is unique compare to other tree frogs. One reason being that depending on the temperature and its surroundings, the gray tree frog can change color from greens to gray in this photo you can see that it is more gray, this is because it is trying to blend in with its background of the cementing paste.

Common: Gray Treefrog

Scientific: Hyla versicolor