1.   The local bird population will appreciate them too.

2.   The loss of forests has had an adverse impact on bird populations.

3.   There were quite Marked differences in the overall structure of the bird populations.

4.   The bird population is decreasing because of oil spills and spreading cities.

5.   The threats to birds are different now, but in their own way more serious, more sinister in their potential effects on bird populations and our own environment.

6.   Concern over the bird population is further compounded by a report from the Nature Conservancy Council on the risks posed to seabirds by the North Sea Oil industry.

7.   The scale of changes in farmland bird populations is only beginning to be appreciated, the Trust says.

8.   Among regions of the United States, its total bird population is second only to the Gulf Coast of Texas.

9.   Bird populations have plummeted, while fish, alligators and other creatures are struggling to survive.