Movie 3

Manual egg-jiggling stimulus. Individual Agalychnis callidryas eggs were jiggled with a blunt metal probe, alternating 15 s of stimulation and 15 s of rest for 5 min or until the egg hatched. The clip shows 5 s of stimulation, after which the embryo begins shaking motions – indicating the start of the hatching process – and the experimenter ceases stimulation. Then the embryo hatches.

How do red-eyed treefrog embryos sense motion in predator attacks? Assessing the role of vestibular mechanoreception

Julie Jung, Su J. Kim, Sonia M. Pérez Arias, James G. McDaniel, and Karen M. Warkentin

Journal of Experimental Biology 2019. 222:None-None; doi: 10.1242/jeb.206052