You may find it, at first, a little hard to see them, for they are puzzle pictures, like those you get in crackers, but once you have found the face, or whatever it may be, you won't be able to help seeing it.
I will start you with quite an easy one. Some of you, I expect, have noticed how often living creatures have a pattern on them like an open eye. This is called an "eye-marking," and is of course quite a different thing from the eye which is used for seeing with. Nearly all our butterflies have an eye-marking somewhere on their wings, and we find it in many other creatures besides butterflies. In birds, for instance (you will remember the peacock at once), and fish (next time you pass a big fishmonger's look out for a John Dory, he has a beauty) and lizards and snakes and frogs and things like that. It is not often seen on animals, though a leopard's or a jaguar's spots are something very like it.
If you look at the picture of the Emperor Moth you will see that there is a very nicely drawn eye on each of his upper wings (his real eyes are quite hidden by his little fur cape); and if you look at the caterpillar of the Elephant hawk-moth long enough, I am sure you will think that he is looking back at you, and that he does not like the look of you much.
The Emperor Moth
Here, again, it is not his eyes that you see, but his eye-markings. In the first picture they are just where you would expect eyes to be, and I must explain to you why. He is called the "Elephant" caterpillar because the head-end of him ("head-end" sounds rather queer; but I think that if one may say "tail-end" one may say "head-end") tapers off very quickly from his fat body, and when he swings this end of him, as he often does, it looks like an elephant's trunk. You will see what I mean in the second picture.
The Elephant Hawk Moth's Caterpillar showing his Eye-markings
Now when he is frightened or angry, he tucks his head in like a telescope close up to the eye-markings, and then these look as if they are really eyes.
