The Minnesota Vikings are facing a bird flew problem with their new stadium that is under construction.

The Audubon Society, citing an environmental study, is concerned that birds will fly into the 200,000 feet of clear glass to be installed in the facility and die. The downtown Minneapolis stadium is near the Mississippi River bird migration corridor.

The Vikings are hoping that Minnesota-based 3M can develop a film that could be applied to the surface to prevent birds from becoming confused and flying into the glass.

“It’s a test, and we’ll see what the test shows down the road,” said Lester Bagley, the Vikings’ vice president of public affairs and stadium development.

Bird advocates contend that the Vikings and the Minnesota Sports Facilities Authority rejected a proposal to install safer fritted glass because of the estimated $1.1 million additional cost.

The Vikings and MSFA argued that the fritted glass would block sunlight from entering the stadium. They also said the glass was already ordered and would be installed early next year.

The bird advocate groups have staged protests at the construction site and at MSFA meetings.

State lawmakers plan to get involved if a solution isn’t found.

State Rep. Phyllis Kahn pointed out that the Jacob Javits Center in New York City is changing the glass in the building to a bird-safe type.