Bold truth: a nearly vanished song is being brought back to life, and it could reshape how we save endangered birds. But here's where it gets controversial: does reviving an original call in captivity truly restore a population’s future, or just buy time for a fragile species?
Scientists have recovered the lost song of the critically endangered regent honeyeater, one of Australia’s rarest birds. Once widespread across south-eastern Australia from Queensland to Kangaroo Island, these birds have dramatically declined in recent decades and now mainly inhabit the Blue Mountains region, with current wild numbers under 250. As their population dwindled, so did the complexity of their song.
The Blue Mountains population developed a shorter, simpler version of the song, losing many syllables and potentially reducing mating success. The breakthrough came when researchers used recordings and real birds to teach captive-born regent honeyeaters the original wild song.
Taronga Zoo in Sydney has conducted a captive breeding program for regent honeyeaters since 1995. Over a three-year period starting with the 2020-21 breeding season, scientists aimed to restore the birds’ full vocal repertoire to improve mate attraction and territorial signaling.
In year one, researchers played the wild songs to fledglings daily for roughly the first six months of life, but this approach did not yield results. In year two, they recruited two wild-born male tutors and organized small tutoring cohorts, which showed greater progress. By year three, each adult tutor worked with about six juvenile males. The study found that the share of youngsters learning the wild song rose from zero to 42% over the three years. Notably, the complete wild song learned in captivity subsequently disappeared from the wild during the study, making the zoo population the primary custodian of the traditional song culture.
Ecologist Dr. Joy Tripovich, affiliated with Taronga Conservation Society and the University of New South Wales, described hearing the zoo-bred birds sing the restored song as “really exciting.” Since 2000, Taronga and partners have released 556 zoo-bred regent honeyeaters into New South Wales and Victoria, including males who learned their original song. Ongoing research is assessing how singing tutoring influences the success of birds released into the wild.
The overarching goal is for the species to become self-sustaining, reducing the need for human intervention. Researchers hope the restored song will boost breeding success and overall fitness for released birds, ultimately enabling wild and captive populations to interbreed—a phenomenon not commonly observed in the past.
The study detailing these findings was published in Nature Scientific Reports.
Would you support more bold, song-based conservation strategies like this, even if it means revisiting a captured population’s cultural traits? Or do you worry about unintended consequences when reintroducing learned behaviors into the wild? Share your thoughts in the comments.
