I live 45 minutes in downtown of Montreal, however, I don't fly my birds in downtown. Nor do a lot of falconers fly their bird IN montreal.... It's probably a bird that belongs to one of the falconers in the AQFA club. Than again, a lot of us here use Hawks here (not many fields here) . I do know one person that owns a Gyr/Saker, but he lives in Gatineau,Quebec. Hope it's your bird!