In this photo released from the University of Florida’s Institute of Food and Agricultural Sciences, Assistant Professor Steve Johnson holds a Cuban tree frog at the Gulf Coast Research and Education Center in Plant City – Wednesday, June 6, 2007. The invasive frog, which can be more than 6 inches long, has colonized the southern half of the state and is moving north. Johnson is testing a repellent that may keep the frogs away from electrical utilities, because they sometimes cause short circuits and blackouts.

(Josh Wickham, University of Florida/IFAS)
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