Based on the context and the answer, generate a question. 

Context: by Cosmic ( Posted Mon Sep 01 , 2008 11:47 am)How high can a fox jump ? The remaining ducks have taken to perching themselves on the highest points of the yard . They feel claustrophobic being locked up and we ca n't make a fort knox style pen until we can find the materials for a large area .

Answer:

They are hiding from foxes .



Why are the ducks so elevated in the air ?