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. 2011 Dec 21;6(12):e28444. doi: 10.1371/journal.pone.0028444

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Forrest, Schlaepfer.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Juvenile lowland leopard frog Rana (Lithobates) yavapaiensis inhabiting Muleshoe Hot Spring, a geothermal ecosystem near Willcox, Arizona. Frogs were repeatedly observed in waters 35–39°C during this study. (Photo credit: MA Schlaepfer).