Backward flight in hummingbirds employs unique kinematic adjustments and entails low metabolic costDOI: info:10.1242/jeb.073114v. 215No. 20The Company of Biologists, Ltd.3603–3611
Sapir, Nir and Dudley, Robert K. 2012. "Backward flight in hummingbirds employs unique kinematic adjustments and entails low metabolic cost." Journal of experimental biology, 215, (20) 3603–3611. https://doi.org/10.1242/jeb.073114.