The dirt tracks winding through southern Colombia¡¯s tangled jungle often mark the beginning of the end for besieged patches of rainforest in this part of the Amazon.

Across San Vicente del Caguan, one of the country¡¯s most deforested regions, illegal and informal roads fan out in an ever-expanding network, bringing visitors, commercial interests and farmers and ranchers who clear and burn the land.

The result is the steady decay of Colombia¡¯s Amazon.