And that, I suppose, is why lions roar. They do it to frighten away the other animals who might spoil their hunt in the jungle.
For the lion's voice, when he roars, is frightfully loud. There is no other animal who can make so much noise—not even the elephant, which is larger than ten lions. If you have ever heard a lion roar, even in his circus cage, or in a city park, you will never forget it.
And so Nero roared, and his father roared, and the other lions, all about them in the jungle, roared until there was a regular lion chorus, and the other beasts, hearing it, slunk back to their dens or caves, or crouched under fallen trees, and one after another said to himself:
"The lions are out hunting to-night. It is best for us to stay in until they have finished. Then it will be our turn."
And so you see how it is that the strength of a lion makes the other animals afraid when the big animals hunt. Elephants do not need to fear lions, for the big animals, with trunks and tusks, do not eat the same kind of food lions eat. Elephants live on grass, hay, palm-nuts and things that grow. But the lion eats only meat, and he would eat an elephant if he could get one, though it might take him a long while.
"Now for the hunt!" said Mr. Lion, as he led Nero into the jungle. "Tread softly. Sniff with your nose until you smell something worth hunting, and then spring on it."
Though lions, like cats, can see pretty well in the dark, they have to depend a great deal in their hunting on what they can smell with their nose, just as your dog can smell a bone, and tell, in that way, where he has buried it in the garden.
So Nero and his father joined the other lions on their march through the jungle in search of something to eat. And Nero kept getting hungrier and hungrier, so that he looked eagerly around every side of him in the darkness, and sniffed so that he might know when he came near anything he could kill and eat.
The other lions were doing the same thing. They did not roar now, but went quietly, slinking through the jungle as quietly as your cat creeps through the grass when she is trying to catch a sparrow. The lions had done enough roaring to scare away other animals who might bother them in their hunt. Now they did not roar any longer, for they did not want to scare away the smaller beasts which were food for them in their hunger.
"I'm going to leave you for a while now, Nero," said Mr. Lion, after a bit. "You will have to get along by yourself. But don't forget the lessons your mother and I taught you."