New dinosaurs include hadrosauroid Koshisaurus katsuyama and bird Nyctisoma robusta.
Cooperation during V-formation flight is reported in Geronticus eremita. Osteoderms from Alamosaurus sanjuanensis, barb geometry of asymmetrical feathers, and the neuroanatomy of Arenysaurus ardevoli are described. A review of large ornithopod tracks is published. Mechanical analysis of the crest in Sinosaurus triassicus confirms that it was too fragile to have been used in physical combat. The jaw mechanics of megaherbivorous dinosaurs from the Dinosaur Park Formation, craniocervical musculature of Falcarius utahensis and Nothronychus mckinleyi, and the evolution of the sternum and gastralia in paravians are examined. Infrasonic signals are found associated with visual displays in Pavo cristatus.