Charming pond. You are seeing real frogs? Where did they come from?

Yes, I am seeing real frogs. I think they are tree frogs? Guess I need to do some surfing.
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We've been seeing all sizes this year. About 2 or 3 years ago, my son (12 or 13 then) drug home a little frog from somewhere, and I wouldn't let him cage it. We released it in the back yard. Last couple of years we would see "him" about 2 or 3 times the whole summer. But this year, we're seeing a lot of them. They "suction cup" themselves to the french doors at night to eat bugs, and to the vinyl siding on my covered front porch around the porch light. I just love em. Any idea what I have?

Yup, they are tree frogs. I just did a quickie search on my ROM Field Guide for my area because your frog looks like mine, and it said they are Gray Treefrogs (Hyla Versicolor). We see them all around our house, had one living in the wheel of the bbq last month (bbq is on a deck 20' above ground!). And I usually see them on the ledge of a window in our dining room and on the ledge of the kitchen window on the bbq deck. I just love them, they are so sweet!

tess

Here is a link that might be useful: Gray Treefrog