African clawed frogs used to be the best human pregnancy tests in the world. Doctors would inject a woman's urine into the back of a female frog; if positive, the frog would lay eggs. Frog or ...

Of all vertebrates, gray foam-nest tree frogs exhibit the most extreme form of simultaneous polyandry, or a female mating with multiple males, says behavioral ecologist Phillip Byrne of the ...

Breeding season can be a dangerous game, especially for male frogs. They sing their hearts out to attract a mate, but sometimes the reward isn't a romance—it's a death sentence! Female green and ...

A female African clawed frog, Xenopus laevis, was housed at the Biological Resources Facility of North Carolina State University in a tank with two other females. The frog was ∼1.5 years old and ...

In the Andaman islands straddling India’s east coast, a species of frogs mate and lay their eggs while upside down, a new study has found. Both the male and female Charles Darwin frogs position ...

These creatures are called amphibians. Frogs are amphibians. In the spring, female frogs lay thousands of eggs in pools or streams. Little black dots in clear jelly balls called frog spawn.

This is called metamorphosis. No, a much bigger change than that! Let's take a look at a frog. Female frogs lay eggs, or frog spawn, in ponds that look a bit like this. The eggs are in the middle ...

During this period, the female frog feeds the tadpoles by producing infertile eggs until the tadpoles metamorphose. Mother mountain chicken frogs may feed their tadpoles 10-13 times during their ...

She is the first Japanese female boxer to win an Olympic medal ... “After the Olympics, I will start looking for a job. I love frogs, so I want something to do with frogs.