In 2020/2021, 476 study burrows were monitored within the Great Barrier Island/Aotea study area with 67% occupied by breeding pairs and fledgling success 76.8%. Only 3 burrows were detected from 128 transects across the remaining medium-grade habitat and distance sampling models could not be run. However, within core high- and medium-grade habitat above 300 m, distance sampling proved a robust population estimate method resulting in 4336 breeding pairs.
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