Just to put you straight on London Zoo, the volunteers' work there is extremely interesting and varied – sometimes rather too exciting! We are in sole charge of three walkthroughs so as well as talking about all the animals we have to make sure both humans and animals are safe. On top of that, there are touch tables, the information kiosk, gorillas to patrol, the craft centre to run, ferrets to exercise and anything else we can think of. If you want to be a keeper volunteer at ZSL however and have contact with animals (which seems to be included in volunteering at smaller zoos) you will need to be an ordinary volunteer for a year or so first, as the keeper volunteer jobs are so sought after and I suppose it's to prove you're enthusiastic.