With his death the only hope of the tribe avoiding extinction faded.

A virus, he wrote, is "a humble little creature with only the intention to avoid extinction and survive."

Is there not a lower limit to the number who can avoid extinction?

They need our human capabilities in order to avoid extinction of their ancient race.

One floor below, another Federal judge was going over maps prepared by the Government to determine how much land the owl needed to avoid extinction.

A reserve for mhorr gazelles was set up in 1971 to help avoid extinction.

In this case the ant avoided local extinction, and the butterfly has been reintroduced.

Mosquitoes have been successful at avoiding extinction so far.

The movie ends with the start of the Stone Age where everyone struggles to survive so as to avoid extinction.

There is today no country in the Union that reaches the reproductive levels necessary to avoid extinction.