But I'm thinking he'll do his best for me still, and you're right about the number of birds we have to kill.

But the process was slow and the numbers of birds low.

The lake is an important nature reserve with a great number of birds.

There are a number of birds I would like to have you identify for me.

One can see number of rare birds on the way to this light house.

Throughout the last century a number of birds have expanded their range.

Now, the question is how to handle the growing number of birds.

The number of wild birds is now believed to be 113.

The two men don't notice the large number of dead birds on the beach.

There are an enormous number of birds on the island.