Island Roars Back to Life After Rat Eradication

More than two centuries after non-native rats were introduced to Hawadax Island, a successful eradication effort has led to a remarkable ecological recovery. Following the removal of invasive rodents, native bird populations on the 6,869-acre island in the Aleutian archipelago have seen increases of 200 percent or more within just two years.

Seabirds that had disappeared during the infestation have begun returning to the island's cliffs to nest. The invasive Norway rats, introduced around 1780 by a shipwreck, had devastated native species that evolved without land-based predators.

A collaborative effort involving the USFWS, The Nature Conservancy, and Island Conservation launched a major rat eradication campaign in autumn 2008. Helicopters were used to distribute rodenticide, effectively removing the pests.

Wildlife surveys conducted after the eradication revealed swift changes. Populations of glaucous-winged gulls, song sparrows, rock sandpipers, and black oystercatchers significantly increased. Notably, tufted puffins and storm-petrels, nearly wiped out previously, were observed nesting again.

The island, formerly known as Rat Island, regained its traditional Aleut name, Hawadax, meaning "entry" or "welcome," in May 2012. This ecological comeback has restored wider natural processes, with returning birds enriching soil and aiding native plant recovery.

Hawadax Island, now part of the Alaska Maritime National Wildlife Refuge, stands as a powerful example for global conservation initiatives aimed at removing invasive predators from islands and restoring damaged ecosystems.