University announcement: 10 November 2026. Excavations: 2016–2018; remains date to the Roman period. Added to UKPX: 13 November.
A concentration of roughly 8,000 frog bones in a Cambridgeshire ditch has acquired a much more ordinary explanation. Bournemouth University and Museum of London Archaeology researchers say birds of prey are the likely source of a deposit that had puzzled archaeologists for years.
Clues in the smallest remains
The bones were recovered during excavations associated with the A14 improvement scheme between 2016 and 2018. The university’s 10 November announcement describes comparisons of bone damage, measurements of frog arm bones and radiocarbon dating.
The team concludes that many frogs died young, during their first winter, around 1,700 years ago. Short-eared owls and hen harriers are the leading predators considered.
A changed landscape
Retreating Fen waters provided breeding habitat, while woodland clearance created more open hunting ground. The researchers connect the accumulation with these environmental changes and human use of the landscape.
The story concerns a material archaeological puzzle and a proposed evidence-based solution. Later headlines about an ancient mystery should not obscure the distinction between when the bones were excavated and when the new explanation was announced.
Sources and reporting date
Bournemouth University: original announcement, 10 November.
Archaeology Magazine: account of the analysis, 11 November.
Sources checked 13 November 2026. Added during UKPX’s one-off review of missed recent news. Related reposts are not treated as independent confirmation.