““As drought kicks in, the choughs experience several things simultaneously. The shortage of food increases their stress levels; the birds are forced to spend more time searching for food, and less time keeping an eye open for predators. If food is really short the birds use up all their body fat and start to use the protein reserves in their breast muscles. This in turn impairs their ability to fly, so that if a predator such as a wedge-tailed eagle does attack they have less chance of escaping. Stress is increased further as birds squabble over food. Whereas group members might once have shared food, as hunger bites individuals become extremely selfish and try to keep food for themselves. Larger or more dominant birds simply push the smaller individuals aside and steal their food; resistance is useless, for the stress of losing a fight may be more damaging still.””
