Source: Pathfinder Bestiary, pg(s). 24–25
Arboreals are long-lived creatures who take a long view of life and history, and rarely meddle in the affairs of short-lived mortals. They tend to act only to protect themselves and the forests under their care from harm. Likewise, many are solitary outside of times of crisis, or meet in communal groups known as "groves" to share knowledge; the largest meetings occur only under the most serious of circumstances, when a region's groves meet for months at a time to plan action against an especially large threat.