According to
this Facebook publication, the remains of a young peregrine falcon from this year have been found on the roof of a building of the campus in the morning of July, 12. Here is a
photo that appears to show the remains. The remains were identified by Dr Guy Fitzgerald who is the head of the raptor clinic (Clinique des oiseaux de proies). It seems that the remains were found on the roof after some remains were found on the soil.
What follows are my remarks and my questions, that is, from an amateur, so do not hesitate to correct me if I you feel I am wrong! The facts that the remains have been found in several parts may suggest that the falcon body has been "cleaned", for example by a vulture (we often see a few of them on the campus), by a common raven or a crow. This in turn suggests that the body was not eaten by a raptor, at least not entirely. Of course it is difficult to not think to the couple of falcons as the cause of the death... But why would they have downed this young peregrine? Two years ago, a young peregrine was released for adoption at about the same period (July, 8) and the operation was a success (it should be noted however that the couple of peregrine was completely different: it was composed by Spirit and Arthurin; also the couple had 3 youngs by its own).
The death could also have nothing to do with the adult peregrines, for example a collision with a structure. This would suggest that the young peregrine was flying low in the middle of a peregrine territory, which would not have been a good idea.
My recent observations show that the female is present most of the time on the tower. Could she have considered the young peregrine as a potentiel threat in the particular context of her recent fights with Spirit?
Finally do you know about similar cases elsewhere?
For completeness I also mention the other news of the same Facebook publication: all the 3 eggs turned out to be unfertile.