Biologists discover cross-dressing butterfly

January 9, 2015 5:31 PM

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"I thought: 'Somebody's fooling with me. It's just too perfect,'" museum volunteer Chris Johnson, a naturalist by trade, said of the moment he first spotted the butterfly. "Then I got goose bumps."

After isolating the butterfly, Johnson and his supervisor called for expertise. Jason Weintraub, a lepidopterist (butterfly expert) and the director of the museum's insects collection, confirmed the butterfly was half-female, half-male -- a relatively rare example of bilateral gynandromorphy.

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