The birds kept flying in even after they built the place, but the area was drained.

He didn't like the country and used to say that the birds kept him awake.

When it was its word against hers, why should the bird keep any promise to release them?

The birds kept singing, and nowhere was there the fear of yesterday.

The four black birds kept her company, though she did her best to ignore them.

We need these big ugly birds to keep the place cleaned up.

Now if the poor bird would just keep flying.

And during such sleep, the outside birds kept their outside eye open more than 85 percent of the time.

Because birds keep a high body temperature, they use lots of energy.

The bird kept making noises like it was talking to itself.