From beyond the open window came the sound of birds.

The sound of native birds can be heard again too.

The sound of birds, and, when he looked up, blue sky.

We are startled one spring morning to hear the sound of birds on the street.

As she walked along, her ears picked up a new bird sound.

They can mimic the sound of other birds and some animals.

The sound of birds came through the open window.

The normal sounds of birds and insects rose around her.

From outside he could hear the sound of birds.

There came the usual sounds of birds and insects from outside.