A baby bird on the ground ... what to do?

Owls do not build "nests". Thus, the owlets leave quickly to explore the surrounding areas without even knowing how to fly, which is the learning phase. The parents continue to feed them while they are on the ground. Know that if you find an owlet seeming abandoned, it may not necessarily be in danger! Leave it there or put it in a higher place, safe from predators, so they can find their parents who do not lose sight of them!