There are many dangers in the natural environment that tree-frog eggs have to face. Fish love to eat the eggs, as do other predators, so adult frogs can lay their eggs on foliage hanging over ponds.

Some tadpoles don’t poop for the first weeks of their lives. At least, that’s the case for Eiffinger’s tree frogs (Kurixalus eiffingeri), scientists report September 22 in Ecology. Eiffinger’s tree ...