Captive-bred giant burrowing frogs released in East Gippsland

What you need to know

• The programme began with tadpoles rescued after the fires, which had affected habitat used by the frogs. Melbourne Zoo raised them in captivity and later achieved successful breeding, a step that made the release possible. 124
• The release is a completed conservation action, but it is not evidence that the wild population has recovered. The reporting does not establish how many of the released frogs have survived, established territories or bred. 1
• Monitoring combines individual tagging with song meters placed at release sites. These devices are intended to detect frog calls, providing a way to check for activity after release; the reported information does not yet give monitoring results. 1
• The subspecies faces pressures including habitat loss and fragmentation, altered fire regimes and climate-related pressures. Government conservation advice also identifies disease and introduced species as relevant concerns. 23
• Sources agree that Melbourne Zoo achieved the first successful captive breeding of the southern giant burrowing frog. They differ on when the tadpoles that founded the captive effort were collected: one account gives 2021 and another gives 2022. 245

Why this matters

The release puts captive breeding into practice as part of recovery work for a threatened frog affected by fire and other habitat pressures. Whether it strengthens the wild population remains an open question, making follow-up monitoring important to judging the value of the intervention. 123

What happens next

Song meters are in place to detect calls at release sites, while tags allow the released frogs to be individually identified. The available reporting does not yet provide survival, breeding or population results, so the effect of the release will need to be assessed through follow-up evidence. 1

What we know

• About 160 tadpoles were collected after the 2019–20 fires and raised at Melbourne Zoo; 53 captive-raised frogs have since been released in East Gippsland. 12
• The first successful captive breeding of the southern giant burrowing frog was reported in 2025, following work to reproduce environmental conditions associated with breeding. 245
• The released frogs were tagged, and song meters were installed at release sites to detect their calls. 1
• The subspecies faces multiple reported pressures, including habitat loss and fragmentation, altered fire regimes and climate-related pressures. 23

What we don't know

• The available reporting does not say how many of the 53 released frogs have survived or established territories. 1
• It is not yet known whether any released frogs have bred, or whether the release will measurably improve the wild population’s status or resilience. 1
• The reported accounts do not provide post-release monitoring results from the tags or song meters. 1
• The collection year for the founding tadpoles remains unresolved in the supplied reporting: the specialist account says 2021, while ABC reports 2022. 24

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