Baby tiger cub in a room playing with soft toys

Fish & Coral Reef Underwater, Bermuda Coastline

Small Bits of Litter in the Sea in Bermuda

Lionfish Swimming Along Seabed Underwater, Bermuda Coastline

Fish & Coral Reef Underwater, Bermuda Coastline

Underwater Coral Reef off Bermuda Coastline

CLEAN : Frozen Ark collects animal DNA in face of mass extinction

Safari lodges and Sabi river on Sabi Sand reserve

CLEAN: Greenpeace makes fresh allegations against Indonesian firm

CLEAN: Shows exterior shots two Rothschild's Giraffes being fed at Dudley Zoo. Giraffes are heading towards a 'silent extinction' with numbers plunging 40% over the last 30 years, conservationists have warned on December 08, 2016 in...

CLEAN: Shows interior shots Rothschild's Giraffes in shed at Dudley Zoo. Giraffes are heading towards a 'silent extinction' with numbers plunging 40% over the last 30 years, conservationists have warned on December 08, 2016 in Dudley,...

CLEAN: Shows exterior shots Snow Leopard walking about in cage at Dudley Zoo on December 08, 2016 in Dudley, United Kingdom.

CLEAN: Shows exterior shots Snow Leopard sitting in cage at Dudley Zoo on December 08, 2016 in Dudley, United Kingdom.

CLEAN: Shows interior shots zookeeper putting buckets of feed in Giraffes cage and Rothschild's Giraffes beginning to eat at Dudley Zoo. Giraffes are heading towards a 'silent extinction' with numbers plunging 40% over the last 30 years,...

CLEAN: Shows interior shots Rothschild's Giraffes moving inside their shed at Dudley Zoo. Giraffes are heading towards a 'silent extinction' with numbers plunging 40% over the last 30 years, conservationists have warned on December 08,...

CLEAN: Shows exterior shots Rothschild's Giraffes at Dudley Zoo. Giraffes are heading towards a 'silent extinction' with numbers plunging 40% over the last 30 years, conservationists have warned on December 08, 2016 in Dudley, United...

CLEAN: Shows exterior shots two Rothschild's Giraffes in paddock at Dudley Zoo. Giraffes are heading towards a 'silent extinction' with numbers plunging 40% over the last 30 years, conservationists have warned on December 08, 2016 in...

CLEAN: Shows exterior shots snow leopard sitting in cage in Dudley Zoo on December 08, 2016 in Dudley, United Kingdom.

CLEAN: Shows interior shots two Rothschild's Giraffes moving into shed at Dudley Zoo. Giraffes are heading towards a 'silent extinction' with numbers plunging 40% over the last 30 years, conservationists have warned on December 08, 2016...

CLEAN: Shows exterior shots a Rothschild's Giraffes walking inside it's shed and chewing at Dudley Zoo. Giraffes are heading towards a 'silent extinction' with numbers plunging 40% over the last 30 years, conservationists have warned on...

CLEAN: Shows interior shots Rothschild's Giraffes in shed eating hay at Dudley Zoo. Giraffes are heading towards a 'silent extinction' with numbers plunging 40% over the last 30 years, conservationists have warned on December 08, 2016 in...

CLEAN: Exterior shots of a Elephant drinking from a river near a Hippopotamus in the Kruger National Park on 9th April 2018, Pretoria, South Africa.

CLEAN: Exterior shots of a herd of zebras grazing in Hwange National Park on August 07, 2015 in Hwange, Zimbabwe.

Almost all species of lemur, the small saucer-eyed primates native to Madagascar, face extinction, an international conservation body warns, adding to its growing list of animals and plants under threat (Footage by AFPTV via Getty Images)