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Amphibians of Nebraska Nebraska Game & Parks Commission
In a Warming World, Freeze-Tolerant Frogs Face New Threats — The Science Writer
Antifreeze-Like Blood Lets Frogs Freeze and Thaw With Winter's Whims
Of warblers and willows Wisconsin Wetlands Association
Frozen Frogs Underfoot - - The Adirondack Almanack
The symphony of spring Wisconsin Wetlands Association
Near to Nature: Frozen Frogs of Bays Mountain - Bays Mountain Park and Planetarium
Peepers – And People – Can Be Confused By Warm Winter Weather
Frozen frogs, a butt-breather and a seasonal genius: How Ontario wildlife survive the winter