As a retired professional wildlife biologist, all I can say about the Center for Biological Diversity is that in my opinion they continually spew forth half truths and outright lies about the issues they are interested in. They are not to be trusted at all. Their former lead guy Daniel Patterson was recently forced to resign from the AZ legislature over a messy domestic abuse charge. As to the introduced domestic ferrets having caused the extirpation of any native NZ species.those claims remain unproven. However the ferrets are easier to trap than the stoats or stoat hybrids so they tend to get the attention. Source Dr Carolyn Kings various publications on the subject and you can educate yourselves accordingly. Other introduced species have caused far more damage to native NZ wildlife.the prime culprits being feral cats and of course rats. Putorius [Posted in FML 7474]