Starting today, a section of the Hauʻula Forest Reserve on Oʻahu, including hunting unit C and the Maʻakua Ridge-Papali Trail, will be temporarily closed. This measure is part of efforts to contain and remove the Little Fire Ant (LFA), a problematic invasive species.
The DLNR Division of Forestry and Wildlife (DOFAW) is collaborating with the Oʻahu Invasive Species Committee, the Hawaiʻi Department of Agriculture, and the Hawaiʻi Ant Lab. Together they are developing a plan to manage this infestation. Their work also involves conducting surveys and control activities on private properties surrounding the forest reserve.
The closure aims to protect hikers, pets, and hunting dogs from LFA stings. The ants deliver painful stings that can cause welts lasting for weeks and may even lead to blindness in cats and dogs. Unlike some other ant species, LFAs do not create mounded dirt nests but inhabit various environments such as trees, potted plants, irrigation lines, and electrical boxes.
“This little ant is a big threat to our quality of life and native plants and animals,” stated DOFAW Oʻahu Branch Manager Marigold Zoll. “We don’t want it to become established in our communities or forest areas, so we need to take quick action. We urge the Hauʻula community to help us in testing their homes and treating any infestations so we ensure it is eradicated from the area.”
Previously detected populations of LFA have been successfully controlled in locations like Lanikai and Waimānalo on Oʻahu; however, this marks its first detection within a forest reserve on the island. Once defined, eradication efforts could extend over a year.
Zoll mentioned that DOFAW staff would participate in upcoming meetings with local community groups: at the Hauʻula Community Association meeting on March 4th and at the Koʻolauloa Neighborhood Board meeting on March 13th. Residents are encouraged to attend these sessions.
