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 ...

Life, even an entity as seemingly simple as a frog egg, is flexible. It has options. At five days or so, red-eyed tree frog eggs, developing right on schedule, can suddenly take a different path if ...

Crawfish frog numbers are on decline due to habitat loss. But scientists in Indiana are working to return species to a historic site. When frogs start disappearing from a place that they've been in ...

For spotted salamander embryos nearing hatching, they get by with a little help – not from friends, but from animals that are actually their predators. Voracious frog tadpoles chew on the egg masses, ...

Crawfish frogs (Lithobates areolatus) were once common throughout the central and southern United States, but are now in decline in some of their range. The reasons aren’t completely known, but some ...

As their eggs hatch, a cichlid mother works quickly to hide her fry, even taking over when dad gets in the way. When it’s time to move them to safety, both parents must work together to protect every ...