Many species of birds nest and reproduce about a month before they formed more than 100 years ago in Chicago and researchers think that is behind it.
These are the findings of a new study published in Journal of Animal Ecology. The researchers compared the new information with century -old products kept in museum collections.
“We learned that birds in Chicago, at least in some ways, nest about 25 days earlier than now before they returned in the early 1900s and with the 1800s, ”said John Bates, bird watcher at Chicago’s Field Museum and the lead author of the study. “This study is designed to look at how bird species in northeastern Illinois change from their spawning days over time.”
The museum had between 50,000 and 60,000 seeds in its collection from 1870 to 1920. There is information about the seeds. Field’s collection, like most, fell after the 1920s, when egg harvesting didn’t go well for hobbyists and scientists.
The findings are in line with others who are working on the environment as a result of climate change, Bates said.
“There has been a marked decrease in the number of babies, although it is difficult to get good data on the performance of each type of baby,” she said. “And the rubbish, they respond to the foliage outside, and so something is moving forward over time.”
In addition to reporting on climate change, the study highlights the importance of museums’ egg collections, which are not used very often.
“There are 5 million eggs out there in global collections, however, there are very few crops that use egg collections,” Bates said. “They are a rich repository of information about the past, and they can help us answer important questions about our world today.”
Birds give birth to their eggs first, and climate change is the reason
John M. Bates et al, Climate change in relation to bird nesting phenology: A comparison of the nesting histories of contemporary museum and history. Journal of Animal Ecology (2022). DOI: 10.1111 / 1365-2656.13683
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