Amazing...
I knew that they had caused a crash in Boston for a Lockheed L188 Electra II but I didn't know just how many of them there could be in a flock until I saw the video. Ingesting that many birds at once must really do some damage.
I guess they will have to either get rid of the trees or the birds at Ciampino, then. Perhaps they can put nets over the trees, as they do with cherry trees.