Was thinking lately about what single zoos can do on the field of conservation and found several examples where a single zoo is responseble for saving a species, sometimes "only" for the zoo-world, in other cases also in the wild. The examples I found are : Slimbridge - without the efforts at Slimbridge I guess the Hawaii goose would be an unknown species in captivity and prop. an extinct species in the wild. In captivity it now is very common and also in the wild it seems to do a little better! Rheine - by the work done on the Gelada at Rheine the species can still be found in a number of zoos. Without Rheine I think the species would have disappeared completely from captivity. Durrell - has worked on a number of species but I guess the most prominent species is the Rodriques flying fox. The species was complete unknown in captivity when Durrell started to work with them and in the meantime its the most commonly kept Flying fox-species in zoos ! Also the wild population seems to do quite fine for the moment. Prague - I guess I can honestly say that Prague saved the Przewalski horse. It was this zoo who started the breeding-ptogramm and thanks to that we now still can see the only wild horse-species in captivity and thanks to re-introductions also again in the wild ! Opel Zoo -by the work of this small, quite unknown zoo we can still enjoy seeing the Mesopotanian fellow deer. In captivity the species is doing pretty well, in the wild the sithuation still is critticaly... Which other zoos have done so much work with one species in the way we can see that this zoo saved that species, would like to hear of more examples !