Foreign object damage of the aircraft and saving the lives of the 18 crew. The remains of 77 birds were found on or near the runway. On January 15, 2009, US Airways Flight 1549 flew into a flock of Canada geese and suffered a double engine failure. The pilot ditched the aircraft in the Hudson River, saving the lives of all on board. People working near aircraft have been sucked into jet engines. Some have died from their injuries. Significant problems occur with airports where the grounds were or have become nesting areas for birds. While fences can prevent a moose or deer
Flock (birds) to find a reliable food source will alert the flock and the entire group may benefit by this finding. While this is an obvious benefit of the information-sharing model, the cost is that the social hierarchy of the flock may result in subordinate birds being denied food by those that are dominant. Another cost is the possibility that some individuals may refuse to contribute in the search of food and instead simply wait for another member to find a food resource. These individuals are known as producers and scroungers, respectively. An intricate hunting system can be seen in the Harris's