National Geographic meets Mirkwood. Or vice versa.
Giant crab spiders are superb ambush predators (Stealth +25 when stationary). In Gator Reach, yellow giant crab spiders hide on the giant yellow flowers common in that area—many of which belong to assassin vines.
A tunnel looks to be a safe hideout from a pair of ogre spiders. In actuality, it is their nest, and they can quite easily squeeze down it to attack meals cowering within.
Spriggans have turned the forest floor into a gauntlet of deadfalls, pit traps, and strewn caltrops. Flying creatures (and flying parties) are not likely to have it any easier—ogre spiders have strung webs between the trees like giant nets.
—Pathfinder Bestiary 3 254