New Tree Toad Species Discovered Researchers have recently identified three unique species of tree toads that bypass the typical egg and tadpole stages. Instead, the females give birth on land to tiny, fully-formed toadlets, each only a few millimeters in length. This type of live birth is extremely rare among amphibians. Of the nearly 8,000 known species of frogs and toads, fewer than 1% give birth to live young. Scientists believe this unusual reproductive method may have evolved in response