1.   In the yew trees nearby, birds sang and the hum of traffic and smell of exhaust fumes carried on the air.

2.   Not a single bird sings in the dry, hollow trees.

3.   So, why do birds sing?

4.   The air was balmy and birds sang.

5.   These birds all sing at intervals, as does the phoebe that has built its nest over my window.

6.   Warm sun, birds singing and dragonflies skimming over the pool.

7.   The birds sang, the bees hummed.

8.   The birds were singing outside our window.

9.   Of course the birds are singing, but they would.

10.   Amid the rumble of the traffic, birds were singing in the trees of Bedford Square.