Kā jaunuļi mācās makšķerēt?
https://www.looduskalender.ee/forum/vie ... 10#p827810
URMAS answered:
How the juveniles learn to fish?
Easy! If they do not fish, then they do not spread their genes. Only those can get chicks, who have instinct to fish in suitable places. First fishing could happen far away form home nest, but also near the nest. More possibilities and more time to find right places and practice fishing have those who's body condition is better. Their batteries are more charged and stand for longer (before additional food).
Some cases are known, when adult feeds chick outside the nest, but first place to come to feed is nest. If one chick is in nest and begs, no much chances for others outside the nest. But if nest collapses and chicks survive that - adults can start feeding on ground. That takes probably some time and hesitating from adult, but may happen. Since on ground predators find the chicks.
I'm almost sure, Julge was not fed outside nest. I think, juveniles (and other adults) look for other specimen, if see near water they pay more attention on that place and if possible, join feeding in the same waterbody. I've seen in hide, that stranger juvenile begging food from adult on stream, even begging from decoy. But did not get anything, of course. That adult had chicks in nest same time, so instinct to feed beggar should be activated. But did not happen in several attempts, during different days.
Those are my opinions about that, but there may be much more diversity as we know currently.
And it may be different in different regions and different conditions and different population density, and etc.