Why do frogs burrow in the ground in the fall?

Answer 1

Frogs and Toads need to hibernate to escape the winter so they dig into the ground up to 3 feet down to avoid the frost during the winter. Some frogs try to find a deep enough body of water that wont completely freeze solid and they can hibernate under the ice. Toads on the other hand will always dig into the ground and are great at digging. It's all to prepare for hibernation because insects don't come out during the winter so there's no food for toads and frogs. They start preparing to find a place during the fall.

Answer 2

Consume extra food and prepare for winter's hibernation, which can include finding/digging a hole or place for hibernation.