At Presqu'ile provincial park, roughly 40 km to the south, the mute swan is present in variable numbers virtually year-round. Its cousin, the tundra swan is a rare spring migrant and occasional fall migrant (LaForest, 1993, pp.54-56). In Peterborough county, to the northwest, the mute swan is not common, but feral birds have been noted from 25 April to 19 December (Sadler, 1983, p.42).
The mute swan prefers to nest in cat-tail marshes, and is well habituated to human presence. Shoreline marshes along the north sides of lakes Erie and Ontario account for most of Ontario's feral swan population (Cadman et al., 1987, pp.62-63). In the revised Bird Breeding Atlas (Cadman et al., 2007, pp.64-65) the mute swan appears to be increasing gradually in number, and breeds at various sites around the Bay of Quinte and Prince Edward County.
Cadman,MD, Eagles,PFJ and Helleiner,FM (1987) Atlas of the Breeding Birds of Ontario. Federation of Ontario Naturalists and Long Point Bird Observatory, published by University of Waterloo Press, 617pp.
Cadman,MD, Sutherland,DA, Beck,GG, Lepage,D and Couturier,AR (editors) (2007) Atlas of the Breeding Birds of Ontario, 2001-2005. Bird Studies Canada, Environment Canada, Ontario Field Ornithologists, Ontario Ministry of Natural Resources, and Ontario Nature, 706pp.
LaForest,SM (1993) Birds of Presqu'ile Provincial Park. Friends of Presqu'ile Park / Ontario Ministry of Natural Resources, 436pp.
Sadler,D (1983) Our Heritage of Birds: Peterborough County in the Kawarthas. Peterborough Field Naturalists / Orchid Press, Peterborough, ON, 192pp.