Northern Red-legged Frog
This happy fellow is on display at Jackson Bottom Wetlands Preserve. Eventually it will get about twice this size.
These are a threatened species and the pros at Jackson Bottom Wetlands are working to improve their habitat in the Wetlands and to raise critters from eggs to when they get their legs when some of them are released to the wild. Then they are mobile and can hopefully (for them) evade their predators.