Discussion of feeding behaviour -
Visitor - The adult in the nest was standing up for a short time after half past two and after three o'clock. Not sure what was going on after half past two, maybe the parent was trying to feed the chicks. Was anyone watching or recording at this time? When I started to watch, the adult was picking up some "things" from the nest and swallowing them, many times (I mean, there were many pieces). I thought that maybe it was something regurgitated and too big for the chicks to eat, but then, maybe I am totally wrong.
I also saw the adult swallowing something quite big and white (don't even want to say what I was thinking at this moment, thank God I was wrong). Could it be it was an eggshell? Do storks eat them? I have never seen it.
Felis silvestris - What I have seen now in the last few days since the chicks hatched is, that the parent stork regurgitates fishes, frogs or whatever he cought for the chicks, lets them eat and when they are finished, he/she will eat whatever is left again. Like that also yesterday for a short time, the idea that the parent ate one of the storklets came up, because it must have been a bigger silver colored fish.
Juta - Hello Visitor!
There is a answer in LK last article:http://www.looduskalender.ee/en/
...the adult lifts the eggshell that disturbs the chicks to the nest rim; things can't be just thrown out, it might be a sign for predators that easy prey is available
SO,first on the edge and then eat it! By the way i saw that big white thing earlier too and thought the same bad thought as you. Fortunately wrong!