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Endangered animals

Last Updated: Wednesday July 15 2009 13:43 GMT

How big is the problem?

Zebra

• The Mekong giant catfish is one of the world's largest freshwater fish. It's up to 3m long. Numbers have dropped by 80 percent in just 13 years because of humans. If that carries on it will soon disappear.

• A hundred years ago there were 100,000 tigers in the wild, now there are between 3,400 and 5,100. Three types of tiger, the Bali, Caspian and Javan tiger, have already become extinct. The South China tiger is struggling to survive and hasn't been seen in the wild since the 1970s.

• The number of Grevey's Zebra has halved in the past 20 years and now there are just 50.