The fourth book in the charming Rabbit & Bear series.
 
Rabbit is surprised: some of the trees in the valley seem to be flying south for the winter. His friend Bear is sure that trees can't fly. Then there's a loud CRUNCH! from Very Near By. It sounds like the world's largest rabbit, eating the world's largest carrot. There's a new creature in Rabbit and Bear's valley, and he's trying to Change Everything.