Sylvester is in Yellowstone National Park and, hearing birds chirping, climbs up the tree to Tweety's nest, despite the ranger's warnings. Unfortunately, he hasn't hatched, so Sylvester must wait him out. Once Tweety does hatch, he decides to poke the cat in the butt with a pin needle, to get him off. Sylvester then gives chase, with Tweety hiding in a hole in the tree; the cat forces him out with an air pump, but Tweety sends up a stick of dynamite instead. The chase then continues to another tree, with Tweety sawing the branch Sylvester is on.