THE STUDY OF BIRD MIGRATION BY RADAR .2. MAJOR ACHIEVEMENTS

This is a brief review of the main insights into bird migration provid ed by radar. Radar is the main tool to study the flight behavior of mi gratory birds under the influence of environmental factors, i.e., the ecology of migratory flights, ranging from the large-scale pattern of migration in relation to the distribution of land masses, geomorpholog y, and weather systems down to the variation of flight behavior of sin gle birds in response to leading lines, obstacles, particular atmosphe ric conditions, and flight phases.