This is the skeleton of a Cricket Frog. Cricket Frogs are small. This one was full grown. Still, for their size, they are incredibly loud, making a sound that reminds you of someone clicking two glass marbles together. When they are alive, they are easily identified by the dark triangle on the top of their head.

It was skeletonized by our garden ants. If you look closely at the photo, you can see some ants looking for the last few bites.