An 80-million-year-old tail bone discovered on Denman Island, British Columbia, provides significant evidence that ornithomimosaurs, bird-like theropod dinosaurs, once inhabited the Pacific coastline of North America. These dinosaurs, which lived during the Cretaceous period, are known for their slender bodies and long legs, resembling modern-day ostriches. The isolated caudal vertebra was identified as belonging to an indeterminate ornithomimosaur through advanced CT scans that created a 3D model for comparison with existing dinosaur fossils. Researchers believe this tail bone likely belonged to a two-legged ornithomimosaur and may have been deposited on the island by a floating carcass or through wave action. While the exact circumstances of its deposition remain unclear, the findings suggest that ornithomimosaurs were present along the western margin of North America. The study emphasizes the need for further fossil discoveries to understand the diversity of these dinosaurs in the region.