Article from today's Herald about stoats. http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10747650
Apparently stoats account for more than 50% of kiwi deaths outside controlled areas, and of course they love to eat most native birds.
As for them getting out to offshore islands, they can swim up to9 5km looking for food..
