No, according to the Department of Squirrel Studies they do not like ripe walnuts.
A squirrel may only eat one part of a walnut because it is rich in nutrients and fat. The shell of the walnut is discarded because it has no nutritional value to the squirrel.
I am not sure, but walnut shell is very hard, so the squirrels can't triturate it to deglute. But I advise you to give a wallnut to a squirrel and watch the little fellow eating the wallnut. If the shell is left on the floor then it is a secure sign that the squirrel did not eat it.
Walnuts when they are still being grown have a green shell. On harvesting, the actual walnut is a nice brown colour. Walnuts are widely used in cakes and walnut oil in salad dressing.
Thumbelina is the fairy tale character who slept in a walnut shell. She is a tiny girl who was born from a flower and taken in by a toad, sleeping in the shell until she finds a new home.
A caterpillar that, when in metamorphosis, cocoon looks like a walnut shell.
In a walnut shell
A walnut is a type of fruit or seed with a hard shell that can be eaten and is produced by trees. The outer green husk of the walnut will eventually turn brown and split open to reveal the edible nut inside.
Walnut is an edible nut with a smooth thin shell.
To open a walnut effectively, place it on a hard surface and use a nutcracker to apply gentle pressure until the shell cracks open. Then, carefully remove the nut from the shell.
walnut shell is the hardest of all wood.
walnut
I just tried this out. Went outside and picked an immature green walnut... a little smaller than a tennis ball and easily cut through the whole thing. Apparently the shell that protects the meat as well as the meat was severly immature and flexible.