11.   Once-abundant birds can become extinct quickly.

12.   The bird nearly became extinct because of loss of habitat and widespread use of DDT and other pollutants that caused reproductive problems in the birds.

13.   The birds soon became bored with the noise, and the machine was subsequently repossessed.

14.   The birds became the foundation of a domestic poultry industry in Europe, and the first settlers from Europe brought the domestic turkey to the Americas with them.

15.   The comparison suggested that all the birds were related but that in recent years the Illinois birds had become less genetically diverse.

16.   The six birds could become the nucleus of the second wild whooping crane flock in the world today, Underwood said.

17.   What can you do when birds become pests?

18.   Great Lakes, as well as on fish farms in the South, as the voracious diving bird has become a destructive invasion force under federal government protection.

19.   Slota said it is believed the birds become ill at the place where they are found rather than being infected in one spot and then flying to another.

20.   This is not the first time that birds have become cricketing casualty.