This seemingly happy little guy is my first frog of the year. Initially, I thought he was a green frog. But then I noticed that he had no ridges (no “dorso-lateral folds”) running all the way down his back from directly behind his eyes, the way green frogs do. His folds just curved behind his eyes and down around his big ear (around his “tympanum”).
I now think that he may be a young American bullfrog. The ears of male bullfrogs are larger than their eyes, while those of females are equal to their eye sizes.
If and when he becomes a full-sized bullfrog, he’ll have no problem identifying green frogs – as meals. (Images taken in Blue Hill, Maine, on May 28, 2025.) Apologies to Kermit.