Western boxelder bugs frequently stretch out in the sun, though not to get a tan. Canadian researchers found that these insects use sunbathing to keep germs at bay.
The winged bugs are often found grouped together in sunny patches in the interior of British Columbia. The researchers said sunlight seems to trigger the biosynthesis of monoterpenes, a strong-smelling chemical compound that encases fungal spores on the insect's body and protects from germ penetration.
"Prophylactic sunbathing defends these bugs against pathogens that they encounter in their shelters," researcher Gerhard Gries, a biology professor at Simon Fraser University, said in a statement. The pheonomen has yet to be observed or reported in other insects, Gries added.
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