In the cool waters of the Hacking River, platypuses named Prometheus and Noris glide through habitat they've reclaimed—descendants of a species that had vanished from Australia's Royal National Park for more than 50 years. Today, these iconic Australian animals have returned, and the numbers tell a story of remarkable recovery: 20 known platypuses now inhabit the park, including juveniles born to parents that were reintroduced just years ago.
This milestone represents far more than a statistical victory. For generations, platypuses simply didn't exist in this landscape. Now, hikers and locals regularly spot them along the river—a wildly different reality than even a few years ago. The reintroduction program, led by Associate Professor Gilad Bino and Dr. Tahneal Hawke from UNSW Sydney's Centre for Ecosystem Science, has achieved what many thought impossible: establishing a self-sustaining platypus population where one had been erased.
The breakthrough accelerated this May when the team released four new animals—males Absinthe and Duckie, and females Hydra and Dawn—into the Hacking River. This third translocation brought the total number of animals moved to the park to 17 since the program began in 2023, when 10 founder platypuses first arrived. What makes this latest release significant isn't just the numbers, but what the team discovered during concurrent surveys: a new subadult male, born in the park during the most recent breeding season. Alongside him, they recaptured Prometheus, a male from that original 2023 cohort confirmed last year as the father of Gili, the first juvenile born in the park.
"It is a privilege to be part of bringing platypuses back to a part of their former range where they had been missing for generations," A/Prof. Bino says. That sentiment captures the essence of what this recovery means—not just the return of a species to a place, but the restoration of something lost to collective memory.
The reintroduction follows a careful, science-driven approach. Each platypus is fitted with a small transmitter before release, allowing researchers to track movements and behavior. The animals themselves are sourced from healthy populations elsewhere in New South Wales and undergo thorough health checks before translocation. This meticulous planning ensures that the reintroduction strengthens the park's population without depleting source communities. As Dr. Hawke explains, the goal is to boost numbers and broaden the gene pool in ways that don't compromise the animals from which they came.
The evidence of success runs deep. The population now spans multiple age classes—from the original founders to juveniles born in the park to subadults maturing in their new home. Breeding has occurred across consecutive seasons, and the platypuses are interacting with the river system as a healthy wild population should. This isn't merely a reintroduction anymore. It's a recovering population standing on its own.
The Platypus Conservation Initiative will continue monitoring survival, movements and breeding in the years ahead. But the trajectory is clear: what seemed impossible just three years ago—restoring platypuses to Royal National Park—is becoming reality, one sighting at a time.