Like the males, female damselflies are red but have some pale green or gray markings on their body and black covering the top of their abdomen.

[4] Information on the life history of the Crimson Hawaiian damselfly is not well-known due to the rarity of the species.

To lay her eggs many female damselflies will patrol streams to find protected areas, and vegetation on submerged rocks.

They often rest on submerged rocks and surrounding vegetation but also explore the open water of their breeding pool or stream.

[6] Adult Crimson Hawaiian damselflies stay close to breeding pools, sit on streamside plants, and guard the stream corridor.

[2] Most immature damselflies are aquatic and inhabit slow-flowing pools and streams, as well as surrounding vegetation until they leave the water to molt into adults.

[8] Based on previous surveys the existing populations of this damselfly have been reduced significantly, with only 10 males or less per 100m of stream edge in all localities.

During observations in Moanalua Stream in the April 2015 BioBlitz, scientists saw individual adult damselflies in the upper valley headwaters.

Their offspring, which spawn in pools and slow flowing sections of streams, are vulnerable to predation by invasive fish.

The review stated that no new information had been found on the biology or life history of the Crimson Hawaiian damselfly, and no changes in status were made.

[2] The review recommended that a targeted search be done to determine the distribution of the species and to evaluate the habitat and the biological characteristics of Megalagrion leptodemas to aid in its conservation.

Finally, the report outlined steps to prevent further spread of invasive species and protect the habitat of the Crimson Hawaiian damselfly.

[2] The Crimson Hawaiian damselfly was one of the species included in the US Fish and Wildlife Service’s Recovery Plan, released in July 2018, for the island of Oahu.

[2] In the short term, the recovery plan attempts to minimize the threats facing Megalagrion leptodemas such as habitat modification and invasive species.

In the long run, the plan will hopefully mitigate the impending effects of climate change, avoid future threats to the species, and increase education and outreach to the general public.