As for species already wiped out in the wild, if groups are being bred in captivity, it may be possible to go a step farther and try to release some into the wild to reestablish a wild population. It could be said that these breeders are making a great contribution to extending the life of species in the wild.
對於已經滅絕的物種，如果有人工繁殖的族群，也許可以進一步復育後放回野外，可說是野生動物傳一線香煙的功臣。