Comments by Date (3)
Phasing seems to affect this area. While in the bamboo wilds none show up, however, moving into the Den of Sorrow makes them appear, albeit in the Bamboo Wilds, where I cannot reach them.
Many of these seem to share spawns. Despite ranging over a wide area I would consistently fight 3-4 in a row that were the exact same battle/rarity.
After searching on and off finally found this pet, there were about 12 spawned. First time I had looked earlier in the day (8am sever). Alas no rare.