Top 10 mammals surviving with help from zoos - in pictures

These scimitar-horned oryx (Oryx dammah) at Whipsnade zoo, native of Tunisia, Morocco and Senegal, are extinct in the wild Photograph: James Godwin/Biaza

The blue-eyed black lemur (Eulemur flavifrons), from Madagascar, is restricted to a very small area of about 2,700 sq km in the north-west of the country and only a small total population remains Photograph: Alamy

The Amur leopard (Panthera pardus orientalis), a native of China, Russia and Korea, is one of the most endangered large cats in the world with fewer than 50 individuals in the wild Photograph: Signe Kalgan/Biaza

San Martín titi monkeys (Callicebus atys oenanthe), from Peru, are not kept in zoos but Biaza zoos are partners in the only conservation initiative to protect this species Photograph: Proyecto Mono Tocon/Biaza

The Sumatran tiger (Panthera tigris sumatrae), from Indonesia. Only 300-400 individuals remain in the wild Photograph: Ralph Dickinson/Biaza

Grevy's zebras (Equus grevyi) in Chester zoo. This species from Ethiopia, Kenya and perhaps South Sudan has experienced one of the largest reductions of range and numbers of any African mammal. When an outbreak of anthrax recently threatened to wipe out many of the few remaining populations, a consortium of zoos funded and administered large-scale vaccinations of animals across northern Kenya Photograph: Steve Rawlins/Chester Zoo/Biaza

White-naped mangabey (Cercocebus atys lunulatus), from Ghana and Cote d’Ivoire. Only 15% of their original habitat remains Photograph: Joanne Iredale/ZSL/Biaza

A Livingstone's fruit bat (Pteropus livingstonii) in Bristol zoo, one of the largest bat species in the world. From Comoros, Africa. Fewer than 1,100 individuals remain in the wild
Photograph: BristolK/Alamy

The pied tamarin (Saguinus bicolor) is found only in a very small region of the Brazilian rainforest Photograph: Birmingham Nature Centre/Biaza

Kumbuka, a 15-year-old western lowland gorilla, at London zoo. Western lowland gorilla (Gorilla gorilla gorilla) are found in Angola, Cameroon, Central African Republic, Congo, Equatorial Guinea, Gabon and Nigeria. They are under threat of extinction from specialist hunting and habitat loss Photograph: Oli Scarff/Getty