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Scientists link 8,000 frog bones in a Roman-era British ditch to birds of prey

Researchers say short-eared owls and hen harriers left more than 8,000 frog bones in a Roman-era ditch, solving a decade-long archaeological mystery.

  • After a decade-long investigation, researchers from Bournemouth University and the Museum of London Archaeology identified short-eared owls as the culprits behind more than 8,000 frog bones found in a Roman-era settlement.
  • During the Roman Era, clearing woodlands for livestock grazing created open terrain, making juvenile frogs vulnerable to short-eared owls that used the ditch as a quiet roosting spot.
  • Researchers ruled out human consumption because the bones lacked cut marks or charring, and breakage patterns confirmed the frogs were consumed by birds of prey nearly 1,700 years ago.
  • "We don't often get an owl's-eye view of the past," said Paul Clarkson, a zooarchaeologist at Bournemouth University, noting the findings reveal how human activity reshaped local ecosystems.
  • The Cambridgeshire Fens study demonstrates how zooarchaeology provides insights into ancient animal behavior, helping scientists reconstruct the natural world and human land use during the Roman Era.
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Phys.org broke the news in Douglas, United Kingdom on Tuesday, November 10, 2026.
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