Escape hatching:

a behavioral response to snake attack

LEFT: Infrared video recording showing part of a parrot snake (Leptophis ahaetulla) attack on a red-eyed treefrog egg clutch. The device in the clutch is an accelerometer, used to record vibrations. The vibration recording from this attack is shown below. Embryos escape with about an 80% success rate.

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• How do the embryos know when to hatch? Find out more.