Giant treetop spiders are allies of Willa and the Warrior Maidens. They can climb up high buildings and their webs are strong enough to lift an adult person. Willa's preferred giant treetop spider is called Bushy. They're presumably sexless, since Bushy prefers to be called "it", not "he" or "she".
- The Fireballs of Plun-Darr (1st appearance)