Peter Rabbit's ears stood straight up with astonishment. “How can a Gray Squirrel be black?” he demanded.
Old Mother Nature smiled. “That is a fair question, Peter,” said she. “Gray Squirrel is simply the name of Happy Jack's family. Sometimes some of the babies are born with black coats instead of gray coats. Of course they are just the same kind of Squirrel, only they look different. In some parts of the country there are numbers of these black-coated Squirrels and many think they are a different kind of Squirrel. They are not. They are simply black-coated members of Happy Jack's family. Just remember this. It is the same way in the family of Rusty the Fox Squirrel. Some members are rusty red, some are a mixture of red and gray, and some are as gray as Happy Jack himself. Way down in the Sunny South Fox Squirrels always have white noses and ears. In the North they never have white noses and ears. Rusty the Fox Squirrel is just a little bigger than Happy Jack and has just such a handsome tail. He is the strongest and heaviest of the Tree Squirrels and not nearly as quick and graceful as Happy Jack. Sometimes Rusty has two nests in the same tree, one in a hollow in a tree for bad weather and the other made of sticks and leaves outside in the branches for use in good weather. Rusty's habits are very much the same as those of Happy Jack the Gray Squirrel, and therefore he likes the same kind of surroundings. Like his cousin, Happy Jack, Rusty is a great help to me.”
Seeing how surprised everybody looked, Mother Nature explained. “Both Happy Jack and Rusty bury a great many more nuts than they ever need,” said she, “and those they do not dig up sprout in the spring and grow. In that way they plant ever so many trees without knowing it. Just remember that, Chatterer, the next time you are tempted to quarrel with your cousin, Happy Jack. Very likely Happy Jack's great-great-ever-so-great grandfather planted the very tree you get your fattest and best hickory nuts from.
“Way out in the mountains of the Far West you have a cousin called the Douglas Squirrel, who is really a true Red Squirrel and whose habits are very much like your own. Some folks call him the Pine Squirrel. By the way, Chatterer, Happy Jack forgot to say that you are a good swimmer. Perhaps he didn't know it.”
By the expression of Happy Jack's face it was quite clear that he didn't know it. “Certainly I can swim,” said Chatterer. “I don't mind the water at all. I can swim a long distance if I have to.”
This was quite as much news to Peter Rabbit as had been the fact that a cousin of his own was a good swimmer, and he began to feel something very like respect for Chatterer.
“Are there any other Tree Squirrels?” asked Jumper the Hare.
“Yes,” replied Old Mother Nature, “there are two—the handsomest of all the family. They live out in the Southwest, in one of the most wonderful places in all this great land, a place called the Grand Canyon. One is called the Abert Squirrel and the other the Kaibab Squirrel. They are about the size of Happy Jack and Rusty but have broader, handsomer tails and their ears have long tufts of hair. The Abert Squirrel has black ears, a brown back, gray sides and white underneath. Kaibab has brown ears with black tips, and his tail is mostly white. Both are very lovely, but their families are small and so they are little known.”
With this, Old Mother Nature dismissed school for the day.