The Northwestern Hawaiian Islands provide habitats for over 30 species and 14 million breeding sea birds, wintering shorebirds, and endangered endemic songbirds and waterfowl.
Most of the world's Laysan Albatross (Diomedea immutabilis) and Black-footed Albatross (Diomedea nigripes) return to the Northwestern Hawaiian Islands to breed and raise their young. Marine debris can look like food, so albatross parents mistakenly feed plastic to their chicks. This can cause the chicks to feel full and they may eventually starve to death.
The Laysan duck has adapted to life on Laysan Island, feeding on small flies that breed in the island's small hypersaline (very salty) lake.