I would say a natural disaster like a forest fire that could kill trees that are their homes. A forest fire could kill the trees and also the cones they eat for food and thus destroy their habitat and also a source of food and the branches they use to travel from one tree to another in the upper stories of the forest.
this makes no sense? there's words that are repeating each other and it's throwing me off or there are even some words that are used wrong or are missing??..