Record Season for Ōamaru Korōrā as Nearly 1000 Chicks Fledge at the World-Famous Blue Penguin Colony
The blue penguins of Ōamaru have had the best breeding season on record, with 994 korōrā chicks fledging from the town’s two managed colonies between May 2025 and April 2026. That compares to around 600 chicks in the previous season, and represents what wildlife managers are calling a significant conservation milestone for the world’s smallest penguin species.
The result caps a remarkable summer at the Ōamaru Blue Penguin Colony, which draws visitors from around New Zealand and overseas to watch the birds come ashore after dark at the town’s waterfront precinct. The colony has been carefully managed for decades, and the record tally of nearly a thousand fledged chicks reflects the accumulated benefit of that long-term commitment — the predator control, the nest-box maintenance, the close observation of individual birds and the scientific monitoring carried out season after season.
Philippa Agnew, the colony’s Science and Environmental Manager, attributed the result directly to that investment of time and care. “Seasons like this are the result of decades of careful management, predator control and close monitoring,” she said. The colony tracks birds individually using microchips, which allows researchers to build detailed pictures of how each breeding pair performs over multiple seasons and to spot the early signs of a strong year.
This year, one pair stood out above all others. The colony’s most exceptional breeding pair of the season raised six chicks — triple the species’ normal reproductive output — in a feat described as a first for the colony in terms of chicks that all successfully fledged. Korōrā typically raise one or two chicks per season, and raising three separate clutches to the point where the young birds are ready to survive independently is a rare and impressive achievement under any conditions.
The chicks themselves also set some individual records. The heaviest chick of the season weighed 1.65 kilograms at seven weeks old, more than 600 grams above the species average at that age. Another chick gained 470 grams in a single week — an 87 percent increase in body weight — pointing to the kind of food availability and parental success that makes for an exceptionally strong season overall.
Korōrā, also known as little blue penguins or fairy penguins, are the world’s smallest penguin species. Adults stand around 30 centimetres tall and weigh approximately 1.5 kilograms. They are found along the coastlines of New Zealand and southern Australia, and while they are not currently threatened nationally, their populations face ongoing pressure from introduced predators, vehicles and habitat loss. The Ōamaru colony is one of the most intensively managed examples of the species anywhere in the world, which is part of why it has become an important site for penguin research as well as a beloved community attraction.
The 2025-26 season got off to an early start, which colony staff say contributed to the final numbers. An early beginning to the breeding cycle gave pairs more time and better conditions to attempt additional clutches, and the exceptional triple-brooding pair made the most of it. The previous 2024-25 season had been more challenging, making the rebound all the more significant.
The results will be shared with the wider scientific community later this year. Ōamaru Penguins will present their findings at Birds New Zealand’s annual conference and at the 12th International Penguin Conference on Phillip Island, Australia. The conference brings together penguin researchers from across the southern hemisphere, and data from well-monitored colonies like Ōamaru’s plays a meaningful role in understanding how penguin populations are responding to changing ocean conditions.
For the people of Ōamaru, the announcement is cause for celebration. The town on the North Otago coast has built part of its identity around its penguin colony, and the little blue penguins — which nest in the town itself and in managed boxes along the foreshore — are woven into the life of the community in a way that is genuinely unusual. Residents and visitors gather at dusk to watch the birds emerge from the sea and make their way up the beach, and a record season means more of those birds will be returning each evening.
For the conservationists who have tended the colony through difficult seasons and good ones, 994 fledged chicks in a single year is a number that reflects not just one exceptional breeding season, but everything that made it possible. It is the kind of result that justifies the patient, unglamorous work of predator trapping and nest monitoring that continues year-round, long after the tourists have gone home.
You can read the full report from RNZ. Have you visited the Ōamaru blue penguin colony? Tell us in the comments below.