So there is a possibility that Winnipeg could handle a couple more pairs of peregrines - one pair south terrritory and one pair in north/east territory - if there were enough food for all.
Not quite that easy, there are habitat requirements besides the amount of food. Need to have the food they like/prefer in abundant supplies on their doorsteps, as you leave the downtown, that (pigeons) decreases. As you go west, you still have the river but also the airport and water treatment plants. Down south its pigeons supplemented heavily by seagull. As you go north, there is nothing but Oak Hammock Marsh. As you go east, you haven't really got anything. And the peregrines will only nest a certain distance from a waterbody and in this City, that's either the Red River or the Assiniboine River. The rest are too small. And you have to have high buildings with suitable surrounding buildings/natural features for all the things a nesting peregrine needs. Think of the Radisson, they hang out on the Sterling, Paris & Richardson Buildings in particular, they hunt over the exchange district and they cruise along the Red River for prey. Not many other places in town that meet those needs AND appeal to peregrines.
