During the spring and summer this year I was conducting frog call surveys as a part of my graduate research. I found this little juvenile gray tree frog at a mitigation wetland in Whiteside County around 11:00 pm at the end of July. Gray treefrogs have a very distinct call,
check it out here. There are actually two species of gray treefrogs in Illinois- the eastern gray treefrog (
Hyla versicolor) and Cope's gray treefrog. However, they are morphologically identical, and can be very difficult to distinguish in the field. Read more about the two species
here.
