page_title: National Zoological Park (United States)
section_title: Think Tank
hierarchical_section_title: National Zoological Park (United States) / Exhibits / Think Tank
caption_attribution_description: English: The "O line" at the National Zoo with two orangutans crossing over visitors. I accidentally left my camera setting on ISO800 after being in a dark indoor area so forgive me for any noise...should have gone with ISO100 obviously in bright daylight conditions. Pedestrian traffic was closed below the animals by park staff. Although the wiki article says on "mild days" they cross the O line, it was 95 degrees and incredibly hot that day.
context_page_description: The National Zoological Park, commonly known as the National Zoo, is one of the oldest zoos in the United States. It is part of the Smithsonian Institution and does not charge admission. Founded in 1889, its mission is to "provide engaging experiences with animals and create and share knowledge to save wildlife and habitats".
  The National Zoo has two campuses. The first is a 163-acre urban park located at Rock Creek Park in Northwest Washington, D.C., 20 minutes from the National Mall by MetroRail. The other campus is the 3,200-acre Smithsonian Conservation Biology Institute in Front Royal, Virginia. On this land, there are 180 species of trees, 850 species of woody shrubs and herbaceous plants, 40 species of grasses, and 36 different species of bamboo. The SCBI is a non-public facility devoted to training wildlife professionals in conservation biology and to propagating rare species through natural means and assisted reproduction. The National Zoo is accredited by the Association of Zoos and Aquariums.
  The two facilities host about 2,700 animals of 390 different species. About one-fifth of them are endangered or threatened.
context_section_description: Think Tank is an area designed to educate visitors about how animals think and learn about their surroundings. Think Tank features several interactive displays that teach visitors how zoologists conduct their studies. The zoo's orangutans (which are sometimes used in keeper demonstrations) are allowed to move from the Great Ape House to Think Tank, and the building includes suitable enclosures for the apes should they choose to stay there. Other animals kept and studied in Think Tank include brown rats, land hermit crabs, Allen's swamp monkeys and red-tailed monkeys. The zoo once had a population of Celebes crested macaques living in Think Tank.
caption: Two orangutans crossing over visitors via the "O Line"
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