At Presqu'ile provincial park, roughly 40 km to the south, this warbler is a common summer resident, arriving as early as 29 April and departing, on average, in mid-October (LaForest, 1993, pp.333-334). On five occasions it was even detected into December, even as late as 30 December. In Peterborough county, to the northwest, the yellowthroat is very common in swamps and marshes (Sadler, 1983, p.141). The common yellowthroat was considered, in the first breeding bird survey of Ontario, to be the most abundant of all warbler species in the province (Cadman et al., 1987, pp.416-417). The species is an abundant summer resident across much of North America and one of the most widely distributed summer bird species across Ontario (Cadman et al., 2007, pp.522-523).
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.