A 22-year study shows that northeastern Illinois is a stronghold for breeding birds and of global importance for several avian species. Breeding Bird Trends in the Chicago Region 1999-2020 provides an update on the status of more than 100 nesting species across grassland, shrubland, wetland, and woodland habitats. The report shows that some breeding bird species are stable or expanding, while others face declines.
The Bird Conservation Network (BCN), a coalition of 21 conservation organizations dedicated to the preservation of birds and the habitats they need to survive, collected the data from managed lands within six counties: Cook, Lake, McHenry, DuPage, Kane, and Will. During the 22-year analysis period, volunteer monitors conducted nearly 30,000 surveys across more than 2,000 points annually in June and early July. The surveys followed strict…