The first major concern with regards to the population decline is the possible extinction of the species.

There was some concern about the degeneration and even possible extinction of the breed.

"I don't want to be contributing to the possible extinction of some of these things."

Many species are under environmental pressure, however, and are facing a possible extinction.

"And this is the man who is between the human race and possible extinction?"

With the cobra head facing possible extinction, some people have apparently decided that the time is right to sing its praises.

The fund's monitoring branch says that the three most harvested species face possible extinction if nothing is done in the next 15 to 20 years.

In the play's silences you do indeed sense the cold loneliness of life perceiving its possible extinction.

Before, we were always just on the edge of possible extinction.

Right now not much is being done to save the deer from possible extinction.