Yes. I think these young are almost good to go (the ones in Europe are; migration starts in August). The parents will be on the hunt all the time at the moment, which is why you may see them on the nest less frequently.
The difference between the young and adult is easiest to spot if you look at the back feathers. Adults have a pretty homogeneously coloured brown coat, the young have yellow margins on the feathers. Also, therey're generally a tad more brownish on the belly side, while the adults are more pure white.
You're lucky to have them so close... it only passes through this country during migration; I've only seen it here twice. Once from my balcony though, that was a bonus
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Best I have been able to do so far is this, from analog times, shot with a horrible mirror tele. I'm not even posting the picture,
a link should suffice. Trust me
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