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Endangered Australian bird losing love song skills as numbers fall

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Ecologists are trying to teach one of Australia’s most at-risk birds its own songs as plummeting numbers mean fledglings are unable to learn their rich “song culture” from older peers.

The regent honeyeater, found in wooded areas south-eastern Australia, is now listed as critically endangered with habit loss the primary driver of its decline.

Recent research by ecologists from the Australian National University found remaining regent honeyeaters were losing their rich repertoire of songs as populations fall.

Like children learning to speak, many bird species learn their songs by associating with adults.

But the honeyeater is at risk of losing its vocabulary as adult birds become increasingly rare.

Regent Honeyeater

Their chances of reproductive success also tumble if they are unable to sing songs that are not impressive enough to attract a mate.

The team is now trying to teach birds bred in captivity the symphonies of their wild counterparts by playing them audio recordings so they have more chance of finding a partner upon release.

Lead author Dr Ross Crates said: “If endangered birds are unable to learn how to sing correctly, it seriously impacts their ability to communicate.”

He added: “It could also be exacerbating the honeyeater’s population decline, because we know a sexy song increases the odds of reproduction in songbirds.

“Females will avoid males that sing unusual songs.”

Regent honeyeater

The researchers found that in regions where populations were slightly higher, the males sang richer and more complex songs.

But in areas where numbers were in steep decline, the males were singing simplified or “totally incorrect” songs.

Co-author of the study Dr Dejan Stojanovic said: “For example, 18 male regent honeyeaters, or around 12% of the total population, were only able to copy the songs of other bird species.

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