and dead waterfowl have been found more recently in northern Illinois, state officials said. The bird deaths were likely due to a highly infectious and deadly strain of bird flu called HPAI.

According to Birdcast, more than 22 million birds crossed over the state of Illinois Sunday night and into Monday morning, with up to 35.5 million birds in flight just after 1 a.m. Monday.

Loons start to migrate north through the state in late March. Loons can be found throughout Illinois on large reservoirs or lakes that afford the birds to feed and become airborne. Loons favor ...

In the case of grassland birds, including those in Illinois, the news isn’t good ... 37% were stable or increasing in other areas of the state. At the time, only about 410,000 breeding Henslow ...

During a physics discussion at the University of Illinois at Urbana-Champaign, she idly sketched out a belted kingfisher, a blue and orange bird she saw many times while fishing on her family’s ...

The nation’s grassland birds, spread across 320 million acres in 14 states, have declined 43% since 1970, more than any other category, and are “in crisis,” according to a report.