1.   All the birds began to hop up and down and twitter, opening and shutting their beaks.

2.   And now gaily plumed water birds began to appear on the rapidly swelling river.

3.   It is said that birds began to pair at the moment of his death.

4.   Out of the stillness, a lone bird began to sing.

5.   These birds begin their flight attacks before we even reach their territory boundary.

6.   As darkness fell, the birds began their evensong.

7.   And even the most detached students of brine lakes became alarmed when birds began to die on the Salton Sea in droves.

8.   And if we stay long enough and our ears catch up with the reality, the birds begin to seem noisy and even sunrise groans.

9.   As birds begin to return to their summer homes, families looking out their windows are likely to spot winged visitors they have never seen before.

10.   A hunter provided ducks for food, and the bird began to hold itself more upright.