A Western Lowland Gorilla is seen walking in this undated photo.
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A gorilla stares while sitting in a clearing on the slopes of Mount Mikeno in the Virunga National Park on Nov. 28, 2008. The park is home to 200 of the world's last 700 mountain gorillas. Park director Emmanuel de Merode later described the discovery of five newborns at the outset of a month-long census as 'quite phenomenal,' given that the endangered gorillas' habitat has long been a war zone.
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Asante the abandoned baby gorilla is weighed in a scale in June 1985.
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Kola the baby Gorilla is seen in 1991 at a Gorilla Orphanage set up in Congo, a project financed by John Aspinall of Howletts Zoo Wild Animal Park.
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Six-month-old Lowland Gorilla Yewande leans back on her favorite pink blanket.
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A baby Mountain Gorilla sits in a tree in Rwanda.
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Zou Zheng/Xinhua/Sipa Press/Newscom
Tourists look at a gorilla with its baby at the African Rainforest Pavilion at the Toronto Zoo, on May 9. Animals with their newborn babies met the tourists here during an event celebrating Mother's Day.
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Mary Knox Merrill/The Christian Science Monitor
Members of the Humba gorilla family interact in Virunga National Park, in Bukima, Democratic Republic of Congo. There are an estimated 200 gorillas in Virunga National Park.
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Twelve-year-old gorilla Kijivu watches her baby daughter rest on her chest in Prague's zoo as they were shown to the public for the first time on Dec. 22, 2004. The young female gorilla was the first ape of its kind born in a Czech zoo on Dec.13, 2004.
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A three-year-old gorilla feeds himself from the abundance of banana tree leaves in the Gorilla Falls Exploration Trail exhibit on April 13, 1998, at Disney's Animal Kingdom in Lake Buena Vista, Fla.
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Thomas Breuer/Wildlife Conservation Society-Max Planck Institute for Evolutionary Anthropology/Reuters
A baby Western Lowland Gorilla silverback is seen in this undated handout photo. In northern Republic of Congo, a crowd of gorillas has survived and flourished so well that environmentalists doubled population estimates there, according to a report released on Aug. 5, 2008.
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A Western Gorilla yawns in this undated photo.
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A five-month-old Western Lowland Gorilla named Komomo is lifted by her mother Momoko at Ueno zoo in Tokyo, Japan, on April 29.
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Gorilla mother Josy carries her four-day old, and still unnamed, young one at the zoo in Hanover, Germany, on Oct. 26, 2009. It is Josy's second baby. Her first, Femi, died at the age of only five months.
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Bobby the gorilla stands in the new Gorilla exhibit at the London Zoo.