This rare species faces a number of threats to its survival.

Many other species may face a similar threat, and conservation biologists are beginning to confront the question of how to respond.

Today's species will face an obstacle course made of cities, farms and other human settlements.

They are the vector for change and adaptation in the greatest challenge the human species has yet faced.

The population was severely depleted, and the species faced extinction.

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

That may turn out to be the most pressing issue our species will ever face.

The species faces extinction due to habitat loss throughout its range.

The species also faces pressure from habitat loss and destruction.

Then every species and civilization could be facing mortal jeopardy.