Illinois Featured Content

  • Warmer springs mean more offspring for prothonotary warblers

    Dec 9, 2020 10:00 am by Diana YatesResearch
    Female prothonotary warbler. Photo by Michael Jeffords

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    • Female prothonotary warbler. Photo by Michael Jeffords

    Prothonotary warblers start their egg-laying in southern Illinois significantly earlier in warmer springs. This increases the chances that the birds can raise two broods of offspring during the nesting season, researchers found.