The NFL season is over, and so is the life of many birds who were soaring through the skies of Minneapolis.

One of the biggest controversies of the Minnesota Vikings new stadium, U.S. Bank Stadium, which opened its doors this year was the glass design.

City Pages reports that many bird conservationists feared that the glass would confuse the birds and the result would not be good.

Jim Sharpstein, a birdwatcher told City Pages:

"We knew that the glass would be highly confusing to the birds. They see a reflection of a blue sky in the glass, they think it's a blue sky. They see reflections of trees, they think they can land in those reflections of trees. This confirmed what we already believed would be bad."

For an 11 week period, bird conservation groups scoured the outside of U.S. Bank Stadium to find bird corpses.

In just those 11 weeks alone, the conservationists found a total of 60 dead birds and an additional 14 birds were 'stunned.'

The bird conservationists conveniently provided a full report of their findings which includes a break down of all the bird species that died.

Of course the 60 birds found by the conservationists were not the only birds that succumbed to these 'football related head injuries.' As detailed in the report:

If the fall 2016 migration season’s total of 60 documented avian deaths were to remain consistent in the future during spring and fall migrations, approximately 360 birds would be killed by U.S. Bank Stadium in a three-year period. And this number significantly underestimates true mortality at the stadium complex, because it does not include birds removed by maintenance staff, security guards, and scavengers

The good news is, there is a solution to this problem that doesn't involve building a whole new stadium. Very simply, the Vikings can choose to put a pattern on the glass or some other coating which would make it very clear to the birds that the stadium is a building and not the sky.

As the New York Times reported in 2015, the Javits Center in New York City put coating on their glass which decreased bird deaths by 90 percent.

The Vikings were aware of the complaints made before the stadium opened and to this point have not issued a statement on the matter. It is unclear at this point if the Vikings plan to add a coating to the glass or if they want to continue to act as a Darwinism complex for various Minnesota bird species.