Why have these two been so effective using this type of species? In essence because they can breed everything they transform their hand to, from big tortoises (hundreds ended up reared prior to zoos had any idea how to breed them) and threatened species of iguanas to St Vincent Parrots. https://sethazcqq.theideasblog.com/39612177/a-secret-weapon-for-yellow-naped-amazon-parrot-uk