The world's smallest penguin is actually two distinct species hiding in plain sight.

Nature · Published 3 October 2026 Swipe more like this →

In short: Standing just over a foot tall, the little penguin is a master of the shoreline. While long considered a single species, recent genetic research reveals a split between New Zealand's endemic birds and their Australian cousins, who arrived across the Tasman Sea only recently to fill a vacant ecological niche.

For centuries, the little penguin—known as the kororā in Māori or the fairy penguin in Australia—was viewed as one uniform species. However, modern science has complicated this picture. A 2016 study, supported by further research in 2019, identified the Australian little penguin as a separate species, Eudyptula novaehollandiae, distinct from the New Zealand endemic Eudyptula minor. This classification is supported by differences in vocalization, plumage, and behavior, such as the Australian lineage's tendency to swim in large groups for predator protection.

The story of their distribution is one of displacement and adaptation. While E. minor is native to New Zealand, the Australian species colonized the Otago region of the South Island between 1500 and 1900. This migration occurred after human activity and introduced predators caused a decline in the local E. minor population, leaving an opening for the Australian arrivals to establish themselves. Today, these penguins are central place foragers, meaning they travel out to sea to hunt small fish and squid but consistently return to the same burrows on the coast.

Conservation efforts for these birds are as varied as their habitats. In Australia, colonies range from massive populations on islands like Montague, which hosts up to 8,000 breeding pairs, to struggling mainland groups like those in Sydney's North Harbour, which have dwindled to around 60 pairs. Threats are diverse, including habitat loss, invasive predators like foxes, and shifting food sources caused by rising sea temperatures. Despite these challenges, the species remains a resilient fixture of the southern coastlines, with some individuals living up to 25 years in captivity.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Southern specialists once named for a northern auk
• The world's deepest-diving birds are not just Antarctic icons
• The hidden diversity of a single penguin species
• The 340-pound penguin that once waddled across New Zealand beaches
• The Northern Pacific once hosted flightless seabirds that looked and acted exactly like penguins.
• Loaches are remarkably diverse freshwater fish that thrive from mountain streams to dark caves.
• Once hunted to near extinction for hat fashion, the little egret is now thriving.
• Why these drab songbirds are evolving toward a life on the ground
• The extinct South American mammals that evolved to look exactly like horses and camels
• Why this tiny, aggressive predator is essentially a bolt of brown lightning in the wild.
• The aquarium favorite that became a top predator in Atlantic reef ecosystems
• The elusive longfin mako shark is a deep-sea predator hiding in plain sight

More in Vertebrates · More in Nature · Latest · A–Z · All topics