Bird and Squirrel embark on one last adventure -- and this time, Red and Birdie come along, too!When best friends Bird and Squirrel find a treasure map, adventure calls once again. Squirrel is worried about the dangers ahead, but this time, Red and Birdie aren't going to miss out on the fun.The foursome's path is full of kooky clues, wacky weather, and creepy creatures. What sort of treasure is at the end of their journey? And can Bird work up the courage to tell his bes