According to the Pnah-u-matigg of Miblos (Easter Edition) the sentient tree processors of the Savage Forests Turquoise West of City Fifteen Human 70% are infested by a tiny race of chameleon riders.
The truthwriters of that Edition Expedition are not certain whether the rider or the chameleon are actually the sentient party in the relationship, however, there is almost certainly symbiotic parity between the wielders of the little glowing treetooth swords and the limber tailless chameleons.