There is a very good article on Reptiles and amphibians in Hawai‘i by Norman Bezona in the West Hawaii Today newspaper. It is titled "Garden friends not always furry or feathered". You can find it at:
http://westhawaiitoday.com/news/local-features/garden-friends-not-always-furry-or-feathered
Lot's of "immigrants" on the island including one of my favorites the Jackson’s chameleon (Trioceros jacksonii)