Ranger Rick is a children's science and nature magazine created by the National Wildlife Federation. Published since 1967, every issue features a comic (formerly short story) series featuring the mascot, a raccoon called Ranger Rick. In every issue, he and his animal friends explore the world while encountering and finding solutions to environmental problems. There exists a partially found 2D animated TV commercial featuring the characters, which was partially found on YouTube by the NWF, at www.youtube.com/watch?v=tsIPlO40dFI&feature=share at 0:00 and 5:34.
According to the official Ranger Rick Twitter page, they know about the existence of the commercial, however, they only have a few records from the early 1970s. It could be likely this commercial was created around 1970 to 1975.
I had a subscription to Ranger Rick's nature magazine in the late 70s. I recall getting these cardboard inserts you could insert into a jar to make an "insect village" of sorts. I was very excited for that.