Eight programmes with Jeremy Cherfas on the changing face of zoos and wildlife parks.
2: The New Menageries Cages with bars are fast giving way to spacious and leafy enclosures which are good for animals and attractive to visitors. But some zoos are devising ever more unusual ways of tempting people to part with their money - pop concerts, ski trails, tame tarantulas, and amazing performing whales.
Producer GEORGE INGER BBC Bristol