Range-restricted species are among those at greatest risk of extinction due to climate change. The critically endangered Helmeted Honeyeater provides a good illustration of this, where the last wild population is confined to a single locality at Yellingbo, 50 km south-east of Melbourne. The establishment of new populations to provide risk-spreading is an urgent priority for the Recovery Team, however options are limited owing to the widespread destruction of the taxon’s preferred habitat. Following an assessment of potential translocation sites throughout the species’ historic range, between 2021 and 2023, a total of 68 Helmeted Honeyeaters were released to a new location in the Yarra Ranges National Park, 30 km from the last wild population at Yellingbo. In 2021, 32 birds were released, comprising 14 captive-bred, and 18 wild-sourced birds. Post-release monitoring revealed that the captive-bred birds displayed far greater post-release site fidelity. The 2022 and 2023 release cohorts comprised of 16 and 20 individuals, respectively, and all were captive-bred. To encourage site fidelity and support population establishment, birds are provided supplementary food across a series of dispersed feeding stations. Adjusted focus camera traps at these stations have provided an effective, novel method to monitor colour-banded individuals in the translocated population. Nesting success will be a key determinant of site viability, and while 13 nestlings have successfully fledged across the 2021-22 and 2022-23 breeding seasons, predation of nestlings by tiger snakes is emerging as a potential issue for this population.