The Burgess Animal Book For Children in "Chatterer And Happy Jack Join"

The third group Timmy the Flying Squirrel has all to himself."

"Where does Striped Chipmunk come in?" asked Chatterer.

"I'm coming to that," replied Old Mother Nature. "The true Squirrels are divided into the Tree Squirrels, Rock Squirrels, and Ground Squirrels. Of course Chatterer and Happy Jack are Tree Squirrels."

"And Striped Chipmunk is a Ground Squirrel," interrupted Ryder, looking as if he felt very much pleased with his own smartness.