Sofia Zoo marmoset, and macaques. The predator sector houses big cats, bears and small predators, including lions, tigers, leopards, pumas and brown bears. In January 2011 the zoo received eight Humboldt penguins on loan from Germany. The penguins are on loan for about 18 months, after which they will be returned, with any offspring to stay at the zoo. The zoo has some 1,400 individual birds representing 192 species. Waterbirds are housed in a lake, and Imperial eagles, Griffon vultures, Egyptian vultures and buzzards in a large walk-through aviary. Other species of birds at the zoo include ostriches, Silver pheasants, peacocks, flamingos,
Dr. Juan A. Rivero Zoo zoo acquired two new giraffes and two desert warthogs to augment the African collection. The animals were brought from Ohio and Louisiana. The recent economic downturn related to the government debt crisis in Puerto Rico has led to issues with zoo maintenance and animal care. Committed to animal welfare, especially those facing extinction, the zoo has several conservations programs for the following species: In an effort to promote conservation, the Dr. Rivero Zoo has started an adoption program in which citizens can "adopt" one of the zoo's animals, and donate to contribute in conservation efforts. Dr. Juan A. Rivero Zoo