But then she said indulgently that humans were always more clumsy and slow than Eggs and most of them never seemed really to learn to fly at all.

You never met them in the air or on tree-tops.
After a while the boy began to move about as the others did, but all three of the children at times did unusual things.

They would stand under the trees and move their arms and legs and heads about in a way which was neither walking nor running nor sitting down.

They went through these movements at intervals every day and the robin was never able to explain to his mate what they were doing or tying to do.

He could only say that he was sure that the Eggs would never flap about in such a manner; but as the boy who could speak robin so fluently was doing the thing with them, birds could be quite sure that the actions were not of a dangerous nature.