Dozens of local birds, including the increasingly rare Henslow’s sparrow, are doing surprisingly well in Chicagoland, according to an analysis of 22 years of data by the nonprofit Bird Conservation Network.
A red-headed woodpecker in Miami Woods Forest Preserve in Morton Grove on July 14, 2022. Previously in steep decline, red-headed woodpeckers seem to be responding to practices such as the clearing of invasive species and restoration of open oak woodlands, according to a study, which found a 3.3% average annual increase.
The study, which began in 1999, drew on more than 29,700 surveys conducted by volunteer monitors at almost 2,500 locations in area parks and nature preserves.sandhill crane Only about 410,000 breeding Henslow’s sparrows remain in the world, and the birds are declining nationally. However, the conservation network study found the birds were up an average of 3.4% per year in Chicagoland.
Sandhills saw an average annual increase of 7.4% in the study. The authors cautioned that the increase may be due in part to the loss of wetlands in other parts of the state, with the birds flocking to the wetlands that remain. The study relied on volunteer monitors — experienced birders who went out to parks and preserves to conduct counts according to detailed instructions. The monitors used eBird, an online database with a free app for recording and sharing sightings.
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