"Some birds don't know what it means to get in before a show starts!"

What if the birds knew what they were doing, to the Sun?

How do birds know when it's time to come back north?

Whatever else the bird knows, it knew enough to come to you.

The black bird knew he had won, and his strength revived.

Those machines are hot; and the birds that have them know it.

Ten to one the birds after him know about it.

It was as if the bird knew they were watching him.

He could get four or five sometimes without the other birds even knowing what was happening.

Even birds know how dear good housing in the city is.