Tracking reveals green turtle hotspots and long journeys in New Zealand
The story at a glance
Since 2025, researchers have tracked 11 rehabilitated green turtles for periods of six to 12 months. Their records identify several North Island coastal hotspots, including Rangaunu, Pārengarenga, Whangārei, the Bay of Islands and Manukau harbours. 1
One turtle travelled nearly 3,000 kilometres over four months between Rangaunu Harbour and Wellington, stopping for a month in Manukau Harbour. The project is ongoing, and the findings have not yet been shown to produce changes in management or protection. 12
What you need to know
- The project provides a picture of movements by rehabilitated turtles, rather than a representative account of the entire wild population. The reporting cautions that rehabilitation may affect how the tagged animals behave. 12
- Rangaunu Harbour is among the reported tracking hotspots. Records also placed turtles over seagrass and harbour-channel areas there, adding detail about where the tracked animals travelled. 12
- Separate evidence supports Rangaunu Harbour’s importance as a foraging area. A 2025 drone survey recorded 27 green-turtle sightings, potentially representing 18 individuals, and confirmed the harbour as a foraging ground. These were not results from the satellite-tracking project. 3
- The records show that at least one tracked turtle made a long-distance journey, while other tagged turtles were reported in coastal areas around Northland and Auckland. They do not establish how common such journeys are among green turtles generally. 12
- New Zealand’s Department of Conservation lists sediment pollution, seagrass loss, boat strikes, fishing bycatch, habitat loss and plastic ingestion among risks to green turtles. The tracking announcement does not report that these risks have been reduced. 4
Why this matters
Movement records can add to understanding of how green turtles use coastal habitats, while the separate drone survey provides supporting evidence for Rangaunu Harbour as a foraging area. The results may inform future conservation planning, but the sources do not establish that protections or management have changed. 134
What happens next
The tracking project is continuing, with improved understanding of turtle movements and important coastal habitat as its stated purpose. The reporting also describes intended engagement with councils, but it remains unclear whether the findings will lead to practical management changes. 12
What we know
- Eleven rehabilitated green turtles have been tracked since 2025, for periods of six to 12 months. 1
- Reported hotspots include Rangaunu, Pārengarenga, Whangārei and Manukau harbours, and the Bay of Islands. 1
- One turtle travelled nearly 3,000 kilometres between Rangaunu Harbour and Wellington over four months, including a month-long stop in Manukau Harbour. 12
- A separate drone survey confirmed Rangaunu Harbour as a green-turtle foraging ground. 3
What we don't know
- How closely the movements of rehabilitated turtles reflect those of wild turtles that have not needed rehabilitation. 12
- Whether the tracking results will lead to changes in coastal management or practical protection for the identified habitats. 12
- Whether the recorded movements and hotspots reflect patterns across the wider green-turtle population, given the project tracks 11 rehabilitated animals. 12
Read the reporting
This WildNews briefing synthesises and summarises reporting from the sources below. WildNews did not produce the original reporting. Learn more about how we use AI
Was this story useful?
Your anonymous feedback helps us make future WildNews briefings more useful.
