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Bull frogs, great blue herons, bigger Oregon spotted frogs (if in captivity and kept at high densities), racoons, otters and even fish. A lot of critters will eat them if given the opportunity. Bull frogs are the biggest impediment to reintroduction attempts. They are a nonnative species in all of the OSF's home range and are difficult to eradicate. They are bigger and more aggressive and quickly out compete the smaller OSF's. Hope this helps!

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14y ago

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