The Hōlua backcountry area of Haleakalā National Park will close from the evening of July 16 through late afternoon on July 17 so park biologists can control non-native Argentine ants.
Bees and Silversword. Paul Krushelnycky
Argentine ants prey upon native insects. One insect that is highly vulnerable to ant predation is the endemic yellow-faced bee, which is a primary pollinator of the threatened Haleakalā `āhinahina (silversword). This species of `āhinahina is found on Haleakalā and nowhere else on earth. Hōlua will reopen on July 17 in the late afternoon.
Source: U.S. Department of the Interior, National Park Service
