The indigo bunting is a common spring migrant and uncommon summer resident and fall migrant at Presqu'ile provincial park, roughly 40 km to the south. Extreme sightings are 28 April to 14 October, with just three reports in the park after mid-August (LaForest, 1993, pp.343-344).
In Peterborough county, to the northwest, the indigo bunting is generally found from 06 May to 12 October, with extremely rare winter sightings (Sadler, 1983, pp.145-146).
References
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.