The wood frog is a small frog. Adults have bodies about 50 mm long. They are a mottled brown color with black patches from their eyes to their jaws. Females are a rusty red color.

Wood frogs eat insects, worms and other small boneless animals. They will eat any animal that will fit in their mouth. They jump forward and flick out their short sticky tongues to capture their prey.

Wood frogs are found in wooded areas, but can also be found in meadows and cities.

The brown colour and markings help the wood frog to look like dead leaves so it can hide on the forest floor. Their main enemies are garter snakes, herons, and small animals like raccoons and chipmunks. The eggs and tadpoles are eaten by snakes, herons and the giant water bug.

Wood frogs lay their eggs in spring in small ponds where there are no fish, so that their eggs do not get eaten by fish. The female lays hundreds of eggs at once in a round ball. Each egg is in a ball of hard jelly. All the eggs are stuck together by soft jelly. The adult frogs leave the eggs and go back to the forest to spend the summer feeding.

The eggs hatch in about 1 week. The tadpoles grow fast when the water is warm. They eat tiny plants and parts of dead plants or dead animals. The tadpoles grow legs and lose their tails when they are about 7 weeks old. Then they leave the pond and live on the land. It takes the young frogs 2 years to become fully grown.

Wood frogs spend the winter frozen solid hiding under leaves and logs. When spring arrives they wake up and move to the ponds to look for mates.