11.   I watched her play the piano beautifully, sing beautifully, garden beautifully, do bird calls beautifully.

12.   In the morning, hoarse bird calls woke me.

13.   On the other hand, tape recordings of certain bird calls show they contain an intricate internal structure.

14.   Peterson reserved some of his finest writing for bird calls.

15.   Some do great bird calls and can eliminate a treacherous tree limb with one graceful whack.

16.   The sound of wind chimes and bird calls will fill the air.

17.   They learn to listen to bird calls, to identify likely nesting and breeding grounds and to aim and focus binoculars quickly.

18.   The air was filled with bird calls and sounds of the wild.

19.   Only six people turned up, exchanging bird calls with the hunters.