The isolated region was researched for a three-year period before filming began.

The old-growth forest here was never logged (as most forests in the area were), most likely due to the difficulty in transporting materials to and from the isolated region.

Under-staffed and under-stocked public health centres were located up to 50 kilometres away from some villages in this extremely isolated region; a long hard walk through dense spiny forest.

Moreover, the coffee farms were located in rather isolated regions.

In some more pristine and isolated regions the species can be common.