Tuataras Found in New Zealand

http://news.yahoo.com/s/ap/20081031/ap_on_sc/as_new_zealand_rare_reptile
This article had me confused. I aalways thought of the tuatara as “the lizardlike creature found in New Zealand”. I didn’t realize it hadn’t actually been on the island (as far as we know) for some two hundred years.

As the artiicle goes on to say (and the Wiki article says), this is apparently the result of a deliberately-established collony on “the mainland”. It’s not as if they had to swim over from other islands.