Females of this species aren't like most other frogs. Instead of laying hundreds or thousands of eggs, they lay only about half a dozen precious ones. That may be why blue poison dart frog dads are so devoted to them. Frog eggs must stay moist, and these devoted dads accomplish that by regularly urinating on them over the course of 10 days, until they hatch as tadpoles. After the eggs hatch, dad's work isn't over. As the primary caregiver, he must carry each tadpole, one at a time, on his back to suitable micropool of rainwater that can serve as an individual nest. Over the next few months, his offspring will develop lungs and legs and eventually become fully formed froglets.