Hi Kinderchick,
When I drive home from work I pass by the Heron Rd building where last year's new pair nested, but so far I haven't seen any falcons on ledges, mind you, I'm keeping one eye on the road and one on the building so I don't see everything. But the building is a light grey and the falcons are dark so I should be able to see something even from the distance I am at.
I had heard from fellow gardeners at the Kilborn garden plots, that a couple of years ago there was a Peregrine falcon that was hunting pigeons on the appartment building adjacent to the garden plots on Kilborn Ave. I will keep an eye out for any activity when I'm there gardening.
I'd like to think the falcon circling my house was saying "Hi" and showing off; it could also be that he/she was keeping an eye on the pigeons that seem to roost in a neighbour's yard a few houses down.
Anne