Hedgehogs prey on the endangered, endemic giant snails (Powelliphanta), the endemic weta species, and various other native invertebrates.
Notable amongst these will be the Tuatara, the Little Spotted Kiwi, a subspecies of the carnivorous Powelliphanta snail, and a range of threatened plants endemic to the Wellington Region.
The ares is also rich in invertebrates including almost half of the know species of amber snails (Powelliphanta).