The Predatory Ecology of Deinonychus and the Origin of Flapping in Birds Fowler, Denver W. ; Freedman, Elizabeth A. ; Scannella, John B. ; Kambic, Robert E. Abstract Publication: PLoS ONE Pub Date: December 2011 DOI: 10.1371/journal.pone.0028964 Bibcode: 2011PLoSO...628964F