Nodoka Mori no Doubutsu Daisakusen
English name: Back to the Forest
Genres: Fantasy
Type: Special, Episodes: 1
Aired: Feb 3, 1980
Studio: Nippon Animation
Source: Unknown
Rating: G - All Ages
Synopsis:
With Peter the fairy as chairman, the animals of Placid Forest gather in a meeting to discuss the villagers' plan to cut down all the trees in the forest. They decide to stage a protest in the hope of preserving the woods, but the greedy men will not listen to their warning. The animals are forced to carry out one final operation. 

(Source: AnimeNFO)