Flying frogs don't fly in the traditional sense of the word. But several species do take to the air in spectacular glides, thanks to special adaptations.
The Wallace's flying frog (pictured above) is one such species, with particularly long toes with webbing between them. The frog spreads these out when it leaps, and the effect is four little parachutes that help the frog maneuver through the trees when it needs to escape a predator or find a mate. The 4-inch-long frogs can glide as far as 50 feet in a single bound.
Here's a video showing different adaptations of a few gliding frog species: