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 6 p.m. (last entry 5 p.m.)

Passes

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Today's hours: 8 a.m. to 6 p.m. (last entry 5 p.m.)

May 08, 2019

Tracking Bison Across the Grasslands of Montana

This update was written by landscape ecologist Hila Shamon.

Related Species:

American bison

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March 20, 2025

Why I'm Tracking Bison Herds

Smithsonian ecologist Claire Bresnan encourages aspiring scientists to take a chance on themselves, and not succumb to "gloom and doom" in her Focus on the Future feature.