Why Birds Irrupt (IMAGE)

University of Utah

Why Birds Irrupt

Caption

Citizen scientists watching backyard birdfeeders helped scientists pinpoint the climate pattern behind boreal bird irruptions, when vast numbers of northern birds migrate far south of their usual winter range.

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Andrew C [<a target="_blank"href="https://creativecommons.org/licenses/by/2.0/">CC BY 2.0</a>] via Wikimedia Commons

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Andrew C [<a target="_blank"href="https://creativecommons.org/licenses/by/2.0/">CC BY 2.0</a>] via Wikimedia Commons

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