Barbara Williams zeros in on a patch of yellow wildflowers with her binoculars. She leans in slightly, her beetle earrings jangling, and proclaims 'that's definitive.'
Barbara Williams zeros in on a patch of yellow wildflowers with her binoculars. She leans in slightly, her beetle earrings jangling, and proclaims"that's definitive."
The 70-year-old amateur naturalist is relieved to have finally located the elusive bee after 30 minutes of searching at the Carl & Myrna Nygren Wetland Preserve in Rockton, Illinois. Williams, a Rockford resident, has noticed a"disturbing" trend during her weekly trips to the preserve. The populations of some of her favorite insects—from bees to beetles to mosquitoes—appear to be in a"free fall," she said.
"A lot can happen from one year to the next in terms of a population having a relatively low abundance year, and that could be followed up for a variety of reasons with a really high abundance year," he said."Or, of course, it could be a signature of something that's happening over and over again." "Extreme heat events can definitely cause some damage, and it can manifest in all sorts of ways," he added."Many insects especially in Illinois are probably able to withstand what we deem as a heat wave—they have a good amount of thermal safety margin—but if they're in that environment for a really long time, that might change.
He said two species worked to fill the"ecological void"—bombus impatiens and bombus bimaculatus—better known as the common eastern bumblebee and two-spotted bumblebee, respectively.
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