Megalagrion nigrohamatum, also known as the blackline Hawaiian damselfly, is a species of damselfly in the family Coenagrionidae that is endemic to Hawaii.
Pinao is the Hawaiian word used to generally identify the damselfly and dragon fly species endemic to Hawai'i.
Description Adults may grow up to 45 mm in length and up to 50 mm wingspan wise.
Ecology and habitat Majority of the population reside along the Koʻolau Range of Oʻahu. Pools/streams with fish and frogs present prohibit the species from inhabiting these areas. Therefore, they reside above man-made and natural barriers like waterfalls or constructed water diversions, where its predators aren't present.
Status The Megalagrion nigrohamatum is listed as endangered on the state and federal level, due to the introduction of non-native frogs, fish, and birds.
References