Comparison of weather radar data over the last 50 years has shown major declines in the numbers of birds along many of the major migratory routes, with estimates that in some cases, the numbers have dropped by 50-percent since the 1970s. Recognition of these declines has intensified efforts to conserve migratory birds throughout the world, in order to protect this unique twice-annual event. Come and hear about this awe inspiring phenomenon and learn what you can do to help. Ages: 8 and up Please register online.