The idea of plant-eating dinosaurs having a strict vegetarian diet has been called into question.
New evidence suggests that some dinosaurs snacked on shellfish and insects as well as plant food.
A study of fossilised droppings indicates duck-billed dinosaurs dined on crabs at certain times of the year.
Fossil remains of dinosaur dinners is rare, so this pescatarian diet may have been overlooked in the past.
The popular perception of what dinosaurs ate was simplistic, said Dr Karen Chin of the University of Colorado, Boulder, US, who led the research.
"Plant-eating dinosaurs had more complex diets than we assumed that they had, and these diets included feeding on some animals, including at least crustaceans, and this was more like diets of modern plant-eating birds," she told BBC News.
The new evidence comes from an area of southern Utah that is regarded as a treasure trove of fossils from the Late Cretaceous Period, when dinosaurs were coming to the end of their reign.=READ MORE
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