From Avatar the last Airbender :

Huu was a waterbending master native to the Foggy Swamp Tribe located southwest of the Earth Kingdom. Huu reached enlightenment while sitting under the great banyan-grove tree in the heart of the swamp. Huu, being the wisest member of the tribe, believed that all living things were connected to one another. Having been so connected to the swamp, Huu made it his duty to behave as the guardian of it, protecting it from those who intend to harm it, while using his exceptional "plantbending" skills to disguise himself as a swamp monster. Despite the apparent lack of political structure in the swamp, other swamp waterbenders appeared to respect him and consider him a leader.

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