1.2" Struthiomimus Fossil Toe Bone Lance Creek FM WY Cretaceous Dinosaur Age Metacanthina Agile and swift Agile and swift Archaeological and environmental evidence indicates that a combination of hunting pressure and habitat alteration—including deforestation and changes in land use—played a major role in the rapid decline of these enormous birds The hands could also have been used to reach around branches and pull down more of the plant to be within the range of the mouth The signature feature of Struthiomimus is the hand size in that the hands are proportionately longer about the rest of the arm than in other known ornithomimid genera