I'm almost certain it's a Spring Peeper. Check this photo and link from the University of Rhode Island. It describes the chirping we hear around our pool and the other characteristics of the one I found.
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Here is a link that might be useful: Spring Peeper at URI
| Sticking with Gray Treefrog. Big difference in "dark X" on SP back and "dark blotch" on Gray's back. |
Here is a link that might be useful: Gray
| 100 % gray treefrog. There are actually two cryptic species in connecticut(i live in Norwalk, CT) Hyla versicolor & Hyla chrysoscelis. They can only be identified 100% by a DNA test. Their calls are also slightly different. They will soon be calling and breeding. |
Here is a link that might be useful: CT Herpetology Blog