Several hundred bees in rural Pennsylvania and rural New York are sporting tiny QR codes on their backs. More than the latest in apiarian fashion, the little tags serve a scientific purpose: tracking when bees go in and out of their hives to better understand how long honey bees spend foraging for food outside of their hives.
source https://phys.org/news/2025-01-bees-itty-bitty-qr-codes.html
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