Answer:
it's either 30 or 50.
Explanation:
They are mainly found around 30 to 50 degrees latitude
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.
I would either answer sanitation(pollution) or corruption