Due to technical difficulties, we cannot process online payments. Free Entry Passes are still available and visitors may purchase Parking Passes at the Zoo (subject to availability).

Due to high demand, line access for the Giant Panda Habitat may close early. Arrive with time to spare for the best chance to see the bears.

Today's hours: 8 a.m. to 4 p.m. (last entry 3 p.m.)

Passes

Today's hours: 8 a.m. to 4 p.m. (last entry 3 p.m.)

Passes

Today's hours: 8 a.m. to 4 p.m. (last entry 3 p.m.)

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March 04, 2013

Sexing A Porcupine

Figuring out the sex of a porcupine can be a difficult task. They aren't always easy to handle, and when they are young they show no sexual dimorphism. But veterinarians, geneticists, and keepers at the Smithsonian's National Zoo have figured out a novel and easy way to determine the sex of...

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Sexing A Porcupine

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