|Location||3400 Vine St, Cincinnati, Ohio, U.S.|
|Land area||75 acres (30 ha)|
|No. of animals||1,896|
|No. of species||500+|
|Annual visitors||1.2 million+|
The Cincinnati Zoo and Botanical Garden is the second-oldest zoo in the United States. It is located in Cincinnati, Ohio, and opened in 1875, just 14 months after the Philadelphia Zoo opened on July 1, 1874. The Reptile House is the oldest zoo building in the United States, dating from 1875.
The Cincinnati Zoo is located in the Avondale neighborhood of Cincinnati. It was founded on 65.4 acres (26.5 ha) in the middle of the city, and since then it has acquired some of the surrounding blocks and several reserves in Cincinnati's outer suburbs. The zoo conducts breeding programs, and was the first to successfully breed California sea lions. The zoo also has other breeding programs including South African cheetahs, Sumatran rhinoceros, Malayan tigers, western lowland gorillas, pottos, and Masai giraffes. The Cincinnati Zoo was the home of Martha, the last living passenger pigeon, which died there in 1914. It was also home to the last living Carolina parakeet in 1918.
In 1872, Andrew Erkenbrecher and several other residents created the Society for the Acclimatization of Birds in Cincinnati to acquire insect-eating birds to control a severe outbreak of caterpillars. A collection of approximately 1,000 birds imported from Europe in 1872 was housed in Burnet Woods before being released. The 'Acclimatization Society of Cincinnati' was established in 1873 as similar organizations with imperial aims proliferated in Moscow, Berlin, London, and Melbourne in the late nineteenth century.
The Zoological Society of Cincinnati established a zoo, consisting of just over sixty-five acres in the cow pasture known as Blakely Woods. The land was purchased by Andrew Erkenbrecher and leased to the Zoological Society for 99 years. This site was acquired in 1874 and the zoo officially opened its doors to the public on September 18, 1875, making the Cincinnati Zoo & Botanical Garden the second oldest intentionally constructed zoo in the United States. The zoo opened with 769 animals on display. Admission was 25 cents for adults and 15 cents for children.
Founded by Jonathan Schoonover of Cincinnati and designed by the landscape engineer Theodor Fundeisen, The Cincinnati Zoo and Botanical Garden was originally named the Cincinnati Zoological Gardens. Architect James W. McLaughlin, who constructed the zoo's first buildings, designed the earliest completed zoological exhibits in the United States. The zoo's original animal collection consisted of eight monkeys, two grizzly bears, three white-tailed deer, six raccoons, two elk, a buffalo, a laughing hyena, a tiger, an American alligator, a circus elephant, and over four hundred birds, including a crow. The zoo also is home to some common peafowls.
The first guide book about the Cincinnati Zoo was written in 1876 in German. The founders of the zoo, including its first general manager, were German immigrants and the city had quite a large German-speaking population. The first English-language edition (illustrated) was published in 1893.
In 1878, the first sea lion was born in captivity, and the first pair of giraffes were acquired by the zoo (Daisy and Abe).
In its first 20 years, the zoo experienced many financial difficulties, and despite selling 22 acres (8.9 ha) to pay off debt in 1886, it went into receivership in 1898. The Cincinnati Zoological Company was able to bring the zoo out of receivership and keep it going. The Cincinnati Traction Company purchased it in 1901 and operated the zoo for 16 years. In 1917, the Cincinnati Zoological Park Association, funded by donations from philanthropists Mary Emery and Anna Sinton Taft, took over management of the zoo. In 1932 the city purchased the zoo and now runs it through the Board of Park Commissioners.
In 1931, Robert J. Sullivan permanently loaned the zoo a female gorilla named Susie. Captured in the Belgian Congo, Susie was first sold to a group of French explorers who sent her to France. In August 1929, Susie was transported from Europe to the United States aboard the Graf Zeppelin accompanied by William Dressman. After Susie completed a tour through the United States and Canada with Ringling Bros. and Barnum & Bailey Circus, Sullivan purchased Susie for $4500.00 and loaned her to the zoo. Dressman, who stayed on as Susie's trainer after she was loaned to the zoo, taught her how eat with a knife and fork and orchestrated two performances every day. Susie was so popular that on her birthday on August 7, 1936, more than 16,000 visitors flocked to the zoo. Susie remained one of the most popular animals at the zoo until her death on October 29, 1947. Her body was donated to the University of Cincinnati, where her skeleton remained on display until it was destroyed in a fire in 1974.
In 1951, the original Monkey House was converted into the Reptile House.
In addition to its live animal exhibits, the zoo houses refreshments stands, a dance hall, roads, walkways, and picnic grounds. Between 1920 and 1972, the Cincinnati Summer Opera performed in an open-air pavilion and were broadcast by NBC radio.
In 1987, parts of the zoo were designated as a National Historic Landmark, the Cincinnati Zoo Historic Structures, due to their significant architecture featured in the Elephant House, the Reptile House, and the Passenger Pigeon Memorial. The zoo's Reptile House is the oldest existing zoo building in the country, dating from 1875.
Animals at the zoo have held several records, including the longest living alligator in captivity at the time (at about 70 years of age), the fastest cheetah in captivity, and the largest Komodo dragon (who died in 2005). The zoo was the first in the United States to put an aye-aye on display, and after losing its last aye-aye in 1993, it finally acquired another in 2011: a 6-year old transferred from the Duke Lemur Center in North Carolina.
The Cincinnati Zoo has been active in breeding animals to help save species, starting as early as 1880 with the first hatching of a trumpeter swan in a zoo, as well as four passenger pigeons. This was followed in 1882 with the first American bison born in captivity.
In 1981, the zoo established the Carl H. Lindner Jr. Family Center for Conservation and Research of Endangered Wildlife for the purpose of using science and technology to understand, preserve, and propagate endangered flora and fauna and facilitate the conservation of global biodiversity. Its Frozen Zoo plays a major role. In it are stored over 2,500 specimens representing approximately 60 animal and 65 plant species.
In the 2010s the zoo built a 8-acre (3.2 ha) Africa exhibit, the largest animal exhibit in its history. Phases I and II, completed in 2010, added an exhibit for cranes and expanded the Cheetah Encounter yard so that the cheetahs had a 40% larger running space. Phase III opened on June 29, 2013 and included a wider vista that offers visitors an opportunity to see African lions, white lions, servals, a bat-eared fox, African wild dogs, and a new cheetah exhibit. A new Base Camp Café, said to be the greenest restaurant in the US, was also added in the 2013 season.
Phase IV, the largest phase of the Africa expansion, opened on June 28, 2014. It introduced a wide savannah with some of Africa's most spectacular hoofstock, such as zebras, gazelles, lesser kudu, impala and giant eland, along with some of the world's largest birds like ostriches, marabou storks and grey crowned cranes.
Phase V, the final phase of the expansion, opened on July 23, 2016, adding an area for Nile hippos, Hippo Cove, which provides both above and below-water viewing. A 34-year-old male named Henry from the Dickerson Park Zoo and a 17-year-old female named Bibi from the St. Louis Zoo joined the zoo. On the morning of January 24, 2017, Bibi gave birth to a six-weeks premature calf. The baby female hippo, named Fiona by zoo staff, is the first hippo to be born at the zoo in 75 years. Fiona was also the first Nile Hippo to ever be captured on an ultrasound image. After intensive care from zoo keepers, veterinarians, and NICU specialists at Cincinnati Children's Hospital, Fiona survived. The story of her trials and success made her an internet celebrity and city hero, and has dramatically increased zoo attendance. Henry's health declined later in 2017 and he was euthanized on October 31.
On July 17, 2017, Eastern Black Rhino baby, Kendi, was born to parents Faru and Seyia. Kendi's birth was captured on camera and can be viewed on the zoo's website. Curator of mammals at the zoo, Christina Gorsuch states, "This calf is only the fifth eastern black rhino born in the last two years in North America." She goes on to say "Every rhino calf born is incredibly important for the population, which includes fewer than 60 in North America. Calves will stay with their mothers for 3-4 years which means that the average female can only have one calf every 5 years."  In 2015, AZA and Species Survival Plan (SSP), determined that parents Faru and Seyia were a good genetic match and recommended that they breed. Faru came to Cincinnati from Atlanta in the summer of 2015 and was introduced to Seyia.
Gorilla World was further expanded in 2016-2017, including the addition of a large indoor building to allow visitors to see the gorillas throughout the year, and Mshindi, a silverback gorilla, came to the zoo from the Louisville Zoo.
On May 28, 2016, Harambe, a 17-year-old, 200-kilogram (440 lb) male Western lowland gorilla, was fatally shot by zoo officials after a three-year-old boy climbed into Harambe's enclosure. The incident was recorded by a bystander and uploaded to YouTube, where the video went viral. Zoo director Thane Maynard stated, "The child was being dragged around ... His head was banging on concrete. This was not a gentle thing. The child was at risk." The shooting was controversial, with some observers stating that it was not clear whether or not Harambe was likely to harm the child. Others called for the boy's parents and/or the zoo to be held accountable for the gorilla's death. The boy was transported to the hospital with non-life-threatening injuries after being rescued. Police are investigating possible criminal charges, while the parents of the boy defended the zoo's actions. The incident received global publicity; comedian and actor Ricky Gervais, rock guitarist and astrophysicist Brian May, and journalist and television personality Piers Morgan criticized the shooting, while real estate developer and television personality Donald Trump, and zoo director and notable animal expert Jack Hanna both lamented the shooting but defended the zoo's decision to prioritize the boy's safety.Primatologist Frans de Waal neither defended nor condemned the zoo's decision, but described it as a horrible dilemma.