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About the Cover
Cover: Above Ctenophorus femoralis eyeballs the camera, while below Ctenophorus caudicinctus is shown in full bipedal flight (photos by Christofer J. Clemente). These Australian dragon lizards are one group of animals capable of bipedal locomotion, along with birds, dinosaurs and primates. Running bipedally was positively related to body size and the proximity of the body centre of mass to the hip, but negatively related to running endurance. Speed was not higher for bipedal strides, but acceleration was. For these lizards, bipedal running seems to occur when lizards accelerate over a certain threshold (see article by Clemente et al., pp. 2058-2065).
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