All of these intelligent races had one goal in mind: to prevent human encroachment.

This was a land that allowed little human encroachment.

It has adapted to human encroachment better than much of Madagascar's wildlife.

Conservationists say two centuries of human encroachment have brought the species close to a crisis.

But, with human encroachment and habitats these resources are depleting.

These animals are considered threatened in their California range because of human encroachment and a respiratory disease epidemic.

Despite human encroachment, the park is still an excellent forest playground for city dwellers.

Once abundant, the bird had become a victim of modern progress and human encroachment.

"But human encroachment on these feeding grounds presents a whole new front in the conservation battle."

It is believed that this was caused by human encroachment.