Laysan Duck

Fascinating facts about the Laysan Duck

• In 1923, there were exactly 7 Laysan ducks left on Earth. A single storm, a single disease, a single predator could have ended the species entirely. Today roughly 600 survive, making them one of the rarest ducks alive — a recovery so narrow that every individual alive today descends from those 7 birds, and their genetic diversity is so low that scientists watch constantly for inbreeding collapse.
• Unlike almost every other duck, the Laysan duck cannot migrate. It lives only on Laysan Island, a speck of coral atoll 1,400 km northwest of Honolulu with no freshwater lakes. Instead these ducks drink salt water and extract the salt through special glands above their eyes, then excrete it as concentrated brine — a trick that keeps them tethered to this one island and nowhere else on the planet.
• Laysan ducks are omnivores in a landscape with almost no plants. They eat flies, mosquito larvae, and bits of seaweed, but they also hunt and consume albatross chicks — a behaviour thought to have evolved when the island faced starvation. They are the only duck species known to actively prey on the young of other seabirds, a shift in diet driven by desperation on an island with few options.
• The species nearly vanished twice: once in 1923 when rabbits introduced by humans ate the island bare, and again in 1964 when only 50 ducks remained. Both times, researchers captured surviving birds and bred them in captivity, essentially gambling that a handful of individuals could repopulate an island. That gamble worked — but only because isolation gave the population nowhere else to go and forced survival into a single managed recovery plan.
• Laysan ducks have no fear of humans because they evolved with no land predators. They waddle toward researchers, show no alarm at approach, and nest in plain sight. This fearlessness — an absence of wariness coded into 7,000 years of island isolation — is now a liability in a world of introduced foxes and cats. Their own biology makes them sitting targets, a reminder that evolution never prepares a species for threats that arrive suddenly from outside.

At a glance

About the Laysan Duck

In the tranquil wetlands of its native Hawaii, the Laysan Duck glides effortlessly, its soft feathers glistening like polished silk as it paddles through the calm waters with a gentle, almost ethereal, quality. With only a few hundred individuals remaining, this critically endangered species moves through its world with a quiet, unassuming beauty, its very existence a poignant reminder of the fragility and wonder of life on the brink. As it forages for seeds and insects, its soft quacks echo through the stillness, a haunting serenade to a world that is rapidly disappearing.

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