Black throated green warbler.

Black throated. green warbler, Rondeau Provincial Park, Ontario, Canada, Sept 11, 2019.
Another of the fall warblers stopping for a break in the yard.

Setophaga virens
In areas where multiple species of warblers breed close together, Black-throated Green Warblers are generally dominant to Blackburnian Warblers, Yellow-rumped Warblers, and Northern Parulas, but subordinate to Magnolia Warblers.

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