By far the hardest named in the zone to get to spawn for me. The rest of the named in the zone spawned within a couple of cycles. I ended up just clearing all of the holgresh up top over and over. There are some serious pathing issues with the holgresh in the huts. Even if you run into the hut, they run through the back wall and 5 minutes later make their way back with 10 mobs following them. I had just over 100 monkey kills when I started, just enough to get the first hunter achievement "Get a Barrel". After clearing holgresh up top, and the gorillas twice to get the named mobs to spawn I completed "Monkey Business" which requires 500 monkeys and then continued for hours before I got him to spawn. Yup, killed around 600 monkeys total in this zone to get credit for the named kills and the hunter achievement.
When he did finally spawn it was on the first landing as you run out from the tree, static spawn just to the left as you get to the landing, as shown above. More than likely you could just clear that 1 spot over and over rather than clearing them all as I did.
How many PH's does this guy have? I been killing him fora few nights at the spawn point marked on the map above and haven't much luck for the past 3 nights expect for the first night.