In 1898, American bullfrogs were imported to California for frog legs; the predators later spread across the West, eating native frogs, fish, snakes, birds and small mammals

In the late 19th century, American bullfrogs were brought to California for a seemingly straightforward purpose: to supply the market for frog legs. In Yosemite National Park, conservationists eventually spent years removing them from the landscape, finally achieving eradication from Yosemite Valley in 2019.

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