A developing frog embryo in its jelly-like egg mass can be quite the escape artist: When predators come calling, the red-eyed tree frog embryo can detect the threat and drop out of its egg to safety ...

What prompts the embryos of certain frogs to hatch early if shaken by a hungry reptile but not if buffeted by an outside force such as rain? According to biologist Karen Warkentin, it's a ...

A new study from the Smithsonian Tropical Research Institute (STRI) shows that red-eyed treefrog embryos hatch early when exposed to high ammonia levels — an environmental cue that it’s too hot and ...

If deadbeat dads among frogs shirk their parental duties, neglected egg clutches can respond by hatching early. Eggs laid on the undersides of leaves by the glass frogs Hyalinobatrachium fleischmanni ...

That’s a frog embryo, leaving its egg to enter the world, and this embryo can hatch at will. The red-eyed tree frog lays its eggs on a branch or leaf above the water. Once they’re in the last third of ...

How does a frog save itself when it hasn’t even been born? Every red-eyed tree frog must confront this dilemma. The frogs lay their eggs on plants that lie over ponds. After a week, the tadpoles hatch ...

Although red-eyed tree frog embryos appear helpless within their jelly-coated eggs, they can hatch up to two days ahead of schedule, reacting within seconds to attacks by egg thieves. Although ...

The secret to the embryos’ quick-escape lies in their hatching glands — special glands, which release an enzyme that dissolves the egg membrane. In many frogs, hatching glands are loosely scattered on ...

Red-eyed tree frog embryos are capable of hatching prematurely if necessary. Otherwise, they continue to develop in safety, in their eggs. (Karen M. Warkentin) A developing frog embryo in its ...