As spring migration ramps up across the Door Peninsula, wildlife advocates are urging residents to take simple steps at home to reduce bird-window collisions, a leading cause of bird deaths in North America.

Each year, millions of birds travel along the Lake Michigan shoreline, making Door County a critical corridor for both migratory and resident species. But with that seasonal movement comes increased risk. Experts estimate hundreds of millions of birds die annually in the U.S. after striking buildings, often mistaking reflections in glass for open sky or habitat.

“Birds don’t recognize glass the way we do,” said Corey Viars, Media specialist, Wisconsin Humane Society, Green Bay and Door County campuses. “When they see trees or sky reflected in a window, they think it’s safe to fly through. During the spring, when activity is at its peak, those collisions increase significantly.”

Viars said homeowners can play a major role in prevention. Applying window clings or decals, placing tape or film on glass, and breaking up reflections are among the most effective solutions. Closing blinds on opposite windows can also prevent birds from attempting to fly through “tunnel” views inside homes.

Other options include hanging reflective materials like Mylar tape or even old CDs, installing netting a few inches in front of windows, or adjusting bird feeder placement.

“With so many birds already facing habitat loss and other threats, reducing window strikes is one of the easiest ways people can help,” Viars said.

Peak migration in Door County typically occurs in April and May, making now an important time for residents to take action. For more information, please visit the Wisonsin Humane Society website.