There is a verified story from the Old Republic era of a Separatist dreadnought that attempted to land in the deep jungle. The ship's pilot misjudged the density of the canopy. Instead of crashing through the branches, the ship landed on a cluster of younger Wroshyr trees.
According to the lore of the Thrawn Trilogy (canon-adjacent), the Wroshyr trees have a slow, almost geological consciousness. And they hate metal. Kashyyyk - Crazy Stories
Wookiees don't fear much. They have a rite of passage called the Hrrtayyk —surviving a night alone in Katarn territory. Only one in ten young Wookiees pass without psychological scarring. There is a verified story from the Old