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 ...

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 ...

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 ...

The hairy frog, also known as the wolverine frog or horror frog, is a remarkably unique species of frog native to Central Africa. Hairy frogs (Trichobatrachus robustus) are in the “squeaker” frog ...

Five-day-old red-eyed treefrog embryos are tightly curled inside dehydrated eggs packed closely together. It’s dry enough to make them begin to hatch early amid heating. Karen M. Warkentin As the frog ...

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 ...

Wood frogs are highly dependent on environmental conditions to determine whether they are active. After fattening up during ...