Thousands of species could become extinct in the near future, as human activities threaten their natural habitats. The Zoos looks at the last-ditch efforts to save many of these species from extinction and preserve global biodiversity. This beautifully shot production provides a portrait of many of the species that are being threatened - from parrots, turtles and beluga whales, to the Arabian onyx - and focuses on the efforts of scientists to breed them in captivity. Linked by a computer network, 400 zoos and aquariums worldwide are working together on captive breeding programs. Efforts in New York, San Diego, Australia and England are among those profiled. The extent to which scientists must go to help a growing number of endangered species survive provides striking testimony to human impact on the environment. Even if many of these species are successfully bred in captivity, the video warns that a growing number may never be introduced into the wild, as their habitats have disappeared.