Treefrogs Hatch Themselves


It’s a good thing for frog embryos to be able to hatch early. Suppose there’s a drought or some other environmental change that means the growing tadpoles would be better off in the water than in the egg.

The timing of hatching is subject to cues from the environment for many species, but even among these flexible hatchers the red-eyed treefrog stands out. It can escape its egg in seconds if threatened by a predator.

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