The babies can usually catch their own fish 2 or 3 days after fledging, but the parents will still bring food for a few weeks. It's not easy for ospreys to find a strong dead tree for their nest. Many ospreys also have a hard time finding enough fish to feed their babies. Man has caused some problems for the ospreys too. Some ospreys get shot even though it is against the law to hunt them.
Fish soak up DDT from the water.
This hurts them in 2 ways. First, it makes their egg shells thin, so the eggs crack when the mother sits on them. Second, since these DDT eggshells don't let much air through, the baby may not be able to breathe inside the shell. In the 1970's, after people stopped using DDT, many more osprey babies survived. Now, people are trying NOT to pollute the water, NOT to shoot ospreys, and NOT to leave fishing line out for them to get caught in.