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Many birds nesting, laying eggs earlier in Chicago

CHICAGO (AP) – Many species of birds are nesting and laying eggs nearly a month earlier than they did 100 years ago in the Chicago area and researchers believe climate change is behind it.

Those were among the findings in a new study published in the Journal of Animal Ecology. Researchers compared recent observations with century-old eggs preserved in museum collections.

“We learned that birds in the Chicago region, at least some species, are nesting as much as 25 days earlier now than they were back in the early 1900s and late 1800s,” said curator of birds at Chicago’s Field Museum and the study’s lead author John Bates.

More details on Wednesday’s Borneo Bulletin