Fiordland Penguin

Fascinating facts about the Fiordland Penguin

• At about 55 cm tall and 3.5 kg on average, the Fiordland penguin is a medium-sized bird whose weight can swing between 2 kg and 5 kg, showing how much individuals can vary even within a single species. It nests among tree roots and rocks in dense temperate coastal forest.
• Each breeding pair lays two eggs, but the first-laid egg is markedly smaller and usually hatches later, often dying before the larger sibling. This built-in brood-reduction strategy is unique among birds and reveals a surprising way nature balances limited resources with the chance of at least one chick surviving.
• During the breeding season they dive in distinct zones: mid-fjord birds hunt within the top 20 m, while outer-fjord penguins make the deepest, longest dives.
• The incubation stretch lasts 31 to 36 days, with both parents swapping long shifts; the male guards the nest for three weeks while the female feeds the hatchling almost daily. This tight partnership underscores how cooperative parenting is essential for success in the harsh, rain-soaked forest cliffs they call home.
• Surveys in the 1990s counted just 2,500 breeding pairs, a likely underestimate, and the population has kept slipping since. With their IUCN status now near-threatened and New Zealand’s Department of Conservation labeling them endangered in 2013, every lost pair brings the species closer to the brink, highlighting how fragile these forest-dwelling penguins truly are.

At a glance

About the Fiordland Penguin

The Fiordland penguin (Eudyptes pachyrhynchus), or tawaki in Māori, is a striking medium-sized crested penguin endemic to New Zealand. Measuring about 55 cm (22 in) in length and weighing on average 3.5 kg (7.7 lb), it wears a tuxedo of black on the head and body with a crisp white front and facial markings. A broad, yellow crest rises from the base of its thick beak, sweeps over the eye and drapes down the neck, giving the bird a regal silhouette that sets it apart from its close relatives, the erect-crested and Snares penguins. It nests in dense temperate coastal forests, tucking its colonies among tree roots and rocky outcrops on the south-western coasts of the South Island, Fiordland, Foveaux Strait, Stewart Island/Rakiura and surrounding isles. The species is nocturnal outside the breeding season, traveling alone at sea for months before returning to breed from July to December, a timing that aligns with peak prey availability. At sea, Fiordland penguins dive for a diet dominated by cephalopods, chiefly arrow squid (Nototodarus sloanii), which may be over-represented in studies, while crustaceans such as krill (Nyctiphanes australis) and occasional fish like red cod and hoki supplement their meals. Their foraging strategy varies with fjord position: outer-fjord birds make deep, long dives, whereas mid-fjord individuals stay within the upper 20 metres. A surprising trait lies in their reproductive system: each clutch contains two eggs, the first markedly smaller and hatching later, yet the larger second egg enjoys higher survival, a brood-reduction mechanism unique among birds. This nuanced balance of predation risk, parental investment and harsh weather shapes the life of the Fiordland penguin, driving a constant push-and-pull between survival and the unforgiving coastal wilderness.

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