Gotcha Traps

A rat is still on the loose on Rangitoto Island, and that's a worry for the Department of Conservation which is working on turning it into one of the country's largest sanctuaries for endangered wildlife. The rodent was detected thanks to a New Zealand invention that started as a $30,000 project 10 years ago. It's called the Black Trakka and it is now used around the world, not only to pick up the footprints of pests in the bush but to track down endangered species. Warren Agnew inventor of Gotcha Traps.