The Cincinnati Zoo & Botanical Garden is the sixth oldest zoo in the United States, founded in 1873 and officially opening in 1875. It is located in the Avondale neighborhood of Cincinnati, Ohio. It originally began with 64.5 acres (26.1 ha) in the middle of the city, but has spread into the neighboring blocks and several reserves in Cincinnati's outer suburbs. It was appointed as a National Historic Landmark in 1987.
Entrance of the Cincinnati Zoological Gardens from the year of its opening in 1875
Assistant Secretary Dan Tangherlini traveled to Cincinnati, Ohio to help dedicate the nation's largest publicly accessible urban solar array and the 6,400 solar panels provide shaded parking for the Cincinnati Zoo's visitors and will produce about 20 percent of the Zoo's annual energy needs, 2011
Asian Elephants (Elephas maximus) at the Elephant Reserve
Martha (passenger pigeon)
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Martha was a passenger pigeon, the last known of her species; she was named "Martha" in honor of Martha Washington, the first lady of the United States from 1789 to 1797.
The stuffed skin of Martha in 1921
Martha after being skinned
Martha in 2015