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For more about vireos (and other birds), see the Cornell Ornithology Lab’s wonderful “All About Birds” website.
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Birdfilms, Michael Male, “Black-capped Vireo” June 6, 2010, via Wikimedia Commons, Creative Commons Attribution
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[https://www.allaboutbirds.org/guide/assets/photo/302142241-720px.jpg, accessed May 2022]