Wildlife & Habitat
The Honouliuli Unit contains two fresh water wetland impoundments that are intensively managed to provide habitat for a variety of waterbirds including Hawai‘i's endangered waterbirds and migrant waterfowl. These two impoundments contain nesting islands, aquatic vegetation and mudflats that are used as nesting and foraging areas by various waterbird species throughout the year.
The Waiawa Unit is composed of two brackish ponds, one of which is primarily managed for the endangered ae‘o. However, the pond’s estuarine environment is ideal for establishing a host of food resources for four endangered waterbird species found there.
The Kalaeloa Unit, once part of the former Barbers Point Naval Air Station, has been added to the Pearl Harbor NWR in order to protect the endangered ‘Ewa hinahina. This area of raised limestone coral reef contains the last remaining ancient coastal dryland plant communities that were once widespread throughout the ‘Ewa plain.
Native coastal plants still flourish at Kalaeloa amongst two endangered plant species. The largest population of ‘akoko on O‘ahu and the second largest population of endangered ‘Ewa hinahina can be found within this unit. Native plants include the night-blooming maiapilo with its beautiful fragrant flowers; the hinahina, a very dense, soft, and silky-looking plant; and naio, one of the few natives that is a strong competitor against alien grasses.