Cap May warbler.
A handsome bird still in spring plumage. It was our only warbler today. Rondeau Provincial Park, Ontario, Canada, August 20, 2025. Setophaga tigrina. The average clutch size of the Cape May Warbler (6 eggs) is greater than that of other warblers. This large clutch size may allow Cape May Warbler populations to expand rapidly during outbreaks of their preferred prey, spruce budworms.

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I tried for owls Sunday morning in Rondeau, but had no luck. I guess they didn't want anything to do with the weather!