One of the main threats is human activities especially with the increasing population.

However, the main threat to species survival is probably human activity.

The main threat to the species is the loss of its habitat.

It is also likely to be the main threat in the Asian part of its range.

The main threat, though, comes from some 30,000 people living around the lake.

The main threat for the development of the island is its size.

But the main threat was not from French ships of war.

Lack of fire is a main threat to the species.

Another main threat to this species is loss of habitat.

Without it, the main threat changed to the left flank.