The cypress (Chamaecyparis lawsoniana) is one of the most widely planted trees in the National Park, coming originally from the west of the United States. Groups of cypress trees, especially when closely spaced, provide low levels of biodiversity. The principal reasons for this are the lack of light inside and amongst the trees and the fact that these exotic trees are resinous and provide edible fruit or leaves for virtually no type of animal. Generally the only animals found in such woods have sought them out as areas for shelter.