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.CHICAGO — — and researchers believe climate change is behind it.Researchers compared recent observations with century-old eggs preserved in museum collections.
The museum has 50,000 to 60,000 eggs in its collection dating from the 1870s to the 1920s. The collection includes information about the eggs. The Field's collection, like most, drops off after the 1920s, when egg-collecting went out of fashion for hobbyists and scientists. “Insect numbers have been shown to be declining, too, although again, it’s hard to have good data on what each species of insect is doing," he said."And insects, in turn, are responding to plant leaf out, and so that’s also something that’s moving forward in time.”
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