As summer turns to autumn, the large animals start to forage in earnest as they prepare for a long winter ahead. Each change of season brings new challenges and rewards, and all the animals of the forest have something to contribute.

The Season of the Bear expansion offers three advanced play modes that can be added to the game Leaf. Animal Allies give each player a unique ability they can use throughout the game. Season Events add extra scoring conditions to each Frost. The Greater Animals affect the whole forest, giving each player an effect they can use once per game.