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Decades-Long Butterfly Study Shows Common Species on the Decline

The most extensive and systematic insect monitoring program ever undertaken in North America shows that butterfly abundance in Ohio declined yearly by 2%, resulting in an overall 33% drop for the 21 years of the program.  Though the study was limited to one group of the insect class and one geographic area, the findings provide an important baseline for what’s happening more broadly with insect populations amid climate change and other human-caused disturbances, the study’s corresponding author said. The findings also are in line with those of butterfly monitoring programs in multiple European countries.  Read more....

 

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