Four deliveries till now! The parents do their best to bring food. They are simply amazing!
I got a mail from M.S.
sometimes I am a bit violent in my reaction
regarding to the screaming humans
1) It is true that this nest site has a protection zone, so called mircoreserve, however, that does not restrict anybody from entering that forest (any time of year). No formal rules are broken here.
5) This nest is quite close to a driveable forest road where it is convenient to park a car, so at some extent it is a surprise that there are so few visits (near bye) so far
7:) Adults do not care humans next to nest tree or near bye while approaching nest with (large) juveniles – most of them seem to approach nest „on autopilot” mode. About once in 10 cases during ringing adults approach nest and feed youngs while we are under nest or even on the tree straight under the nest.
A few times adult bird has almost landed on back of my collegue who is IN the nest.

sorry, but this is funny!
All that said, it is not „innocent” if people frighten birds to the point when they all leave the nest and never return – see my previous email about departure ages. Mean age of birds that leave the nest because of (human; precise cause not known in most cases) disturbance is 76,8 days (67.4-82,6, n=25). Age of this company at the time of my writing is 73,6 (F3), 73,8 (F4), 73,0 (F5) 71,7 (F6). Two of those frightened 25 are younger than the youngest of these four. An important addition to that is – none of those 25 have appeared anywhere afterwards. Some still might (we do have the 1st records of some ringed birds be registered just 10 years after their ringing) but for now they are likely among those that have failed. So I consider significant disturbance this time of year be worse than any other time of breeding season. (Disturbance in early spring may mean there might be no breeding at all, however adults in that case are free and can „enjoy summer” on their own, if it happens now it may mean waste of season, no success plus both adults are exhausted and may have reduced capacity to make it to the next year).