On September 17, 2012, the U.S. Fish and Wildlife Service announced (pdf) that it had issued a final rule listing 23 species native to the Hawaiian island of Oahu as threatened or endangered under the Endangered Species Act.  The species include 20 plants and three damselflies. The rule follows a legal settlement with the Center for Biological Diversity that required the agency to make determinations with respect to 757 species, including 17 of the 23 Oahu species granted protection.  At the same time it issued the listing determinations, the Service designated 42,804 acres (or approximately 67 square miles) of critical habitat for 124 species.  Nearly 93% of the designated habitat has previously been identified as necessary to the conservation of the newly listed species.

According to the Fish and Wildlife Service all of the listed species are threatened by habitat  destruction and alteration.  The Crimson Hawaiian damselfly, pictured below, is one of the species listed, and like a butterfly also goes through metamorphosis. 

http://www.endangeredspecieslawandpolicy.com/2012/09/articles/listing-decision/fish-and-wildlife-service-lists-23-oahu-species-and-designates-over-40000-acres-as-critical-habitat/