From British Columbia to central Ontario, white-throated sparrows have ditched their traditional three-note-ending song for a two-note-ending variant. Researchers don’t know what has caused the change, and found that the new song didn't give male birds a territorial advantage over others. "But in white-throated sparrows, we might find a situation in which the females actually like songs that aren't typical in their environment. If that's the case, there's a big advantage to any male who can sing
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White-throated Sparrows come in two color forms that differ in head color: white-striped and tan-striped birds. The distinct plumages are not related to age or gender, as is the case with many bird species. How do the two forms interact? Find out here: https://abcbirds.org/bird/white-throated-sparrow | American Bird Conservancy
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