Unfortunately a few too many things did get through, but the authorities are more strict now. They realise how many millions it could cost them further down the track. NZ let ferrets go wild. They had many flightless birds that got decimated. They brought in possums from Australia and they're killing off some of their trees. And the list goes on.
Whilst first starting as a Crocodile Cubit, questions/comments about other reptiles made me decide to broaden it to other reptiles as well, and frogs. There's very many groups and species but I'll cover what I come in contact with and photograph.