I was coming back into my building early this afternoon when I spotted something out of place. In the lower right corner, just inside the metal frame against the large plate of tinted glass, was a blob. That’s all it really looked like at first. When I got closer, though, I noticed that this blob was a frog. I’m pretty sure it’s a common or eastern gray tree frog (Hyla versicolor). There is another very similar frog, the Cope’s gray tree frog (H. chrysoscelis) so I cannot say for sure, but this seems like a reasonable guess and the yellow patch on its legs (which you cannot see in this photo) means it is one of those two.
I moved him off the door so I wouldn’t be lying on the ground right there, keeping others from going in or coming out. The frog was very compliant and let me get quite close, as you can see.