A new study finds an estimated 111 birds are killed every year in collisions at U-S Bank Stadium. The 300-thousand-dollar study was funded by the Minnesota Sports Facilities Authority and the Vikings. The stadium and three other high-rise buildings in downtown Minneapolis account for 74 percent of bird collisions and 68 percent of the fatalities.
The study was ordered due to complaints from wildlife groups claiming the glass on the stadium would be disastrous for migratory birds. Researchers say treating the existing glass, leaving the lights on at night, and avoiding vegetation near the glass doors would help reduce the number of bird collisions.