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Denver Zoo Conservation Alliance
Denver Zoo Conservation Alliance is an 80-acre (32 ha) nonprofit zoological garden and conservation organization located in City Park of Denver, Colorado, United States. Founded in 1896, it is operated by the Denver Zoological Foundation and funded in part by the Scientific and Cultural Facilities District (SCFD). Its other sources of funding are ticket sales and private donations. It is the most visited paid attraction in Denver.
Denver Zoo was started with the donation of an orphaned American black bear. With the construction of Bear Mountain, it became the first zoo in the United States to use naturalistic zoo enclosures rather than cages with bars. It expanded on this concept with Primate Panorama, featuring huge mesh tents and open areas for apes and monkeys, and with Predator Ridge, which has three separate areas through which animals are rotated so that their overlapping scents provide environmental enrichment. Toyota Elephant Passage, which opened on June 1, 2012, is divided into five areas for rotating the various species.
Denver Zoo is accredited by the (American) Association of Zoos and Aquariums (AZA) and American Humane and is also a member of the World Association of Zoos and Aquariums (WAZA). The zoo achieved ISO 14001 certification in 2009, was given the first AZA Green Award in 2011, and was named the "Greenest Zoo in the Country" at the World Renewable Energy Forum in 2012. In 2015, it was re-certified for ISO 14001 and achieved OHSAS 18001 certification, becoming only the fourth zoo in the world to get both certifications.
Denver Zoo was founded in 1896 when an orphaned American black bear cub named Billy Bryan – short for William Jennings Bryan, after the contemporary American politician – was given to Mayor Thomas S. McMurray as a gift. McMurray gave the hard-to-manage cub to the keeper of City Park, Alexander J. Graham, who started the zoo with this animal. Other animals at the young zoo included native waterfowl at Duck Lake, native prairie dogs, pronghorn antelope which roamed the park, and a flock of Chinese pheasants, which later populated the eastern plains of the state.
As this collection grew, the newly-formed park board continued to focus almost exclusively on acquiring native animals, with a notable pheasant collection and rhesus macaques as the exceptions. Some of the most popular animals at the park were large herds of bison and elk.
In 1905, a population of red squirrels was added to the zoo's collection; this population grew rapidly and decimated the bird population at Duck Lake. A plan to shoot the squirrels was scrapped when citizens protested. Instead, as many squirrels as could be caught were sent to the Denver Mountain Parks.
The zoo was a motley menagerie until 1906, when Mayor Robert W. Speer declared that the zoo's "[p]rison bars can be done away with" in favor of "concrete rocks, waterfalls, trees, etc." Speer hired the city's landscape architect, Saco R. DeBoer, to draw up the plans for his renovation and appointed Victor H. Borcherdt as zoo director.
Borcherdt designed the Bear Mountain exhibit, which opened in 1918. This structure is 43 ft (13 m) tall and 185 ft (56 m) long, and cost $50,000 to build ($1,070,243 in 2025 dollars ). It was built of dyed and textured concrete forms cast from Dinosaur Mountain just outside Morrison, Colorado. Hidden moats replaced cage bars, and native plants and an artificial stream enhanced the natural look. The two main exhibits originally housed polar bears and grizzly bears.
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Denver Zoo Conservation Alliance
Denver Zoo Conservation Alliance is an 80-acre (32 ha) nonprofit zoological garden and conservation organization located in City Park of Denver, Colorado, United States. Founded in 1896, it is operated by the Denver Zoological Foundation and funded in part by the Scientific and Cultural Facilities District (SCFD). Its other sources of funding are ticket sales and private donations. It is the most visited paid attraction in Denver.
Denver Zoo was started with the donation of an orphaned American black bear. With the construction of Bear Mountain, it became the first zoo in the United States to use naturalistic zoo enclosures rather than cages with bars. It expanded on this concept with Primate Panorama, featuring huge mesh tents and open areas for apes and monkeys, and with Predator Ridge, which has three separate areas through which animals are rotated so that their overlapping scents provide environmental enrichment. Toyota Elephant Passage, which opened on June 1, 2012, is divided into five areas for rotating the various species.
Denver Zoo is accredited by the (American) Association of Zoos and Aquariums (AZA) and American Humane and is also a member of the World Association of Zoos and Aquariums (WAZA). The zoo achieved ISO 14001 certification in 2009, was given the first AZA Green Award in 2011, and was named the "Greenest Zoo in the Country" at the World Renewable Energy Forum in 2012. In 2015, it was re-certified for ISO 14001 and achieved OHSAS 18001 certification, becoming only the fourth zoo in the world to get both certifications.
Denver Zoo was founded in 1896 when an orphaned American black bear cub named Billy Bryan – short for William Jennings Bryan, after the contemporary American politician – was given to Mayor Thomas S. McMurray as a gift. McMurray gave the hard-to-manage cub to the keeper of City Park, Alexander J. Graham, who started the zoo with this animal. Other animals at the young zoo included native waterfowl at Duck Lake, native prairie dogs, pronghorn antelope which roamed the park, and a flock of Chinese pheasants, which later populated the eastern plains of the state.
As this collection grew, the newly-formed park board continued to focus almost exclusively on acquiring native animals, with a notable pheasant collection and rhesus macaques as the exceptions. Some of the most popular animals at the park were large herds of bison and elk.
In 1905, a population of red squirrels was added to the zoo's collection; this population grew rapidly and decimated the bird population at Duck Lake. A plan to shoot the squirrels was scrapped when citizens protested. Instead, as many squirrels as could be caught were sent to the Denver Mountain Parks.
The zoo was a motley menagerie until 1906, when Mayor Robert W. Speer declared that the zoo's "[p]rison bars can be done away with" in favor of "concrete rocks, waterfalls, trees, etc." Speer hired the city's landscape architect, Saco R. DeBoer, to draw up the plans for his renovation and appointed Victor H. Borcherdt as zoo director.
Borcherdt designed the Bear Mountain exhibit, which opened in 1918. This structure is 43 ft (13 m) tall and 185 ft (56 m) long, and cost $50,000 to build ($1,070,243 in 2025 dollars ). It was built of dyed and textured concrete forms cast from Dinosaur Mountain just outside Morrison, Colorado. Hidden moats replaced cage bars, and native plants and an artificial stream enhanced the natural look. The two main exhibits originally housed polar bears and grizzly bears.