Avian radar is an important tool for aiding in bird strike mitigation as part of overall safety management systems at civilian and military airfields. Properly designed and equipped avian radars can track thousands of birds simultaneously in real-time, night and day, through 360° of coverage, out to ranges of 10 km and beyond for flocks, updating every target's position (longitude, latitude, altitude), speed, heading, and size every 2–3 seconds. Data from these systems can be used to generate information products ranging from real-time threat alerts to historical analyses of bird activity patterns in both time and space. The United States Federal Aviation Administration (FAA) and the United States Department of Defense (DOD) have conducted extensive science-based field testing and validation of commercial avian radar systems for civil and military applications, respectively. The FAA used evaluations of commercial 3D avian radar systems developed and marketed by Accipiter Radar as the basis for FAA Advisory Circular 150/5220-25 and a guidance letter on using Airport Improvement Program funds to acquire avian radar systems at Part 139 airports. Similarly, the DOD-sponsored Integration and Validation of Avian Radars (IVAR) project evaluated the functional and performance characteristics of Accipiter® avian radars under operational conditions at Navy, Marine Corps, and Air Force airfields. Accipiter avian radar systems operating at Seattle-Tacoma International Airport, Chicago O'Hare International Airport, and Marine Corps Air Station Cherry Point made significant contributions to the evaluations carried out in the aforementioned FAA and DoD initiatives. Additional scientific and technical papers on avian radar systems are listed below, and on the Accipiter Radar web site.