"The Bird Avoidance Model is used as a key tool for analysis, predictability, and correlation of bird habitat, migration, and breeding characteristics, combined with key environmental, and man-made geographic data. [...] The model was created to provide Air Force pilots and flight scheduler/planners with a tool for making informed decisions when selecting flight routes. The model was created in an effort to protect human lives, wildlife, and equipment during air operations throughout the conterminous United States and Alaska. [...] The model is used by the Department of Defense and is now available to the general public through this Internet application."
United States Avian Hazard Advisory System: http://www.usahas.com