World's largest albatross colony at Midway Atoll National Wildlife Refuge

Papahānaumokuākea has the largest tropical seabird rookery in the world, with 5.5 million seabirds nesting every year and 14 million residing seasonally. Almost all of the world’s vulnerable mōlī (Laysan albatross) and endangered kaʻupu (Black-footed albatross) are here.