With more than 50 species in the world currently listed as endangered, or critically endangered, on the World Wildlife Fund's Species Directory, institutions like Singapore Zoo are key to saving them.

See also: Rangers protect 3 of the last remaining northern white rhinos in the world

The zoo has been involved in multiple conservation programs. Its famous orangutans have managed to birth 41 offspring over the past 40 years. Their public educational programs are another way Singapore Zoo is contributing to the preservation of animal species and their habitats.

Take a look at these gorgeous photographs showing a few of the protected animals.

Additional reporting by The Associated Press.