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Male lyrebirds that are looking for love can use their mimicry to "compose" songs to serenade females during the breeding season.

Research led by Western Sydney University found the ground-dwelling birds that are renowned for their ability to mimic can also "compose" songs from the sounds they hear in their environment.

Lead researcher PhD student Fiona Backhouse says lyrebirds are a bit like hip-hop artists, using sounds produced by other birds to compose new songs by assembling them into sequences.

Many bird species organise their songs into sequences, yet little is known about the drivers of that sequence structure, including with lyrebird mimicry.

"We've established that each population has a characteristic song sequence, where individual males sing the same song sequence many times during the breeding season with only minor variations," she said.

"His neighbours will sing a very similar song sequence, but there are differences among populations," Ms Backhouse said.

On average, the study found the similarity between sequences an individual male sings was 40.7 per cent - a figure significantly higher than expected by random chance.

The study found that lyrebirds copied sequences from their neighbours - who also copied sequences from others.

"This then provides the ingredients for a 'game of telephone', whereby changes in sequence structure evolve throughout the species' range," the study said.

"This process is similar to how geographical differences arise in human communication."

Songs were sung with a high acoustic contrast, suggesting that sequence structure was a means to enhance perceptions of the male lyrebirds' repertoire.

"Lyrebirds appear to compose their song sequences to maximise drama ... so that consecutive samples are as dramatically different as possible.

"This seems like an excellent way to give the listener the best and quickest impression of the virtuosity of the male's mimicry."

Previously, lyrebirds and other vocal mimics were viewed as 'passive' mimics - like a recorder merely reproducing what they heard.

"This research shows that lyrebirds do in fact use their mimicry to 'compose' long, complex songs, all in an effort to appeal to their female listeners."

The study of male Albert's lyrebirds in Bundjalung Country, in eastern Australia was published in Proceedings of the Royal Society B: Biological Sciences.

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Economists will be scouring the minutes of the Reserve Bank board's most recent meeting for hints on whether interest rates could rise soon.

The minutes of the RBA board's April monetary policy meeting will be released at 11.30am.

NAB's Tapas Strickland said the minutes would be scrutinised for any hints on whether the RBA could contemplate starting its hiking cycle as early as May.

"Guidance from the post-meeting statement hinted rate hikes from June with the board waiting for 'important additional evidence ... on both inflation and the evolution of labour costs'," he said.

The latest inflation data will be released on April 27.

Prime Minister Scott Morrison told reporters in Fremantle on Monday cost of living pressures were "real", but were having a far greater impact in other countries than Australia.

"The Reserve Bank of Australia sets independently the cash rate in this country," he told reporters when asked whether he thought the cash rate would go above one per cent.

"A strong economy that is backed in by a well-managed budget, that's what puts downward pressure on interest rates."

The last rise in the cash rate was in November 2010.

The Australian Bureau of Statistics will release household spending figures on Tuesday.

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Opposition Leader Anthony Albanese has switched tactics from policy announcements to attacking the coalition government, as Labor takes a hit in the polls.

Scott Morrison is ahead as the choice for preferred prime minister with 38 per cent, against 30 per cent for Mr Albanese, a sharp turnaround on the Labor leader's 37-36 margin of two weeks ago.

The Resolve Strategic poll for The Sydney Morning Herald-The Age also showed Labor's primary vote down four points to 34 per cent, with the coalition up one to 35 per cent.

Starting the second week of the May 21 election campaign in Brisbane, Mr Albanese blasted the prime minister over his response to the COVID-19 pandemic and natural disasters over the past two years.

"What we saw from the federal government, whether it be bushfires, floods or the pandemic is a real pattern of behaviour," he said, after speaking with flood victims in the Brisbane suburb of Auchenflower.

"He only acted when the political pressure was really put on."

Mr Albanese warned voters to expect health cuts if the federal government is returned to power, calling the government's future health minister Anne Ruston a threat to accessible medical care.

"This is a health minister, now designate ... who we know will undermine Medicare, who has said that the current model is not sustainable, who has said that Medicare funding is just putting things on the credit card," he said.

"This is another example of what we can expect if Scott Morrison is re-elected."

When the $7 patient co-payment was included in the 2014 coalition budget, Senator Ruston told parliament Medicare was not sustainable without it.

Senator Ruston said the government had since been clear it would not be making funding cuts to Medicare.

"We absolutely have guaranteed Medicare in law," she told ABC Radio.

Mr Morrison, who was in Fremantle to unveil a $124 million investment in two new Evolved Cape Class patrol boats, ruled out future cuts to Medicare.

"She (Senator Ruston) said yesterday there wouldn't be any cuts and I'll repeat that today," Mr Morrison said on Monday.

"I introduced the legislation to guarantee Medicare and to guarantee the Pharmaceutical Benefits Scheme.

"Because if you can't manage money, which people know Labor can't, the consequences of that is essential services suffer."

Mr Morrison told reporters under his government, Medicare expenditure rose to $31.4 billion, and the bulk billing rate rose by more than six per cent.

The prime minister was forced to clarify comments about the JobSeeker rate.

During his press conference on Monday, Mr Morrison said the rate was $46 a week, when the unemployment benefit was $46 a day.

When questioned about it, Mr Morrison said he had misspoke.

During the first week of the campaign, the prime minister had attacked the opposition leader for failing to name the unemployment rate.

Mr Morrison will spend two days in WA before heading to Brisbane for the first leaders' debate with Mr Albanese.

The prime minister also unveiled a plan for first-time homeowners who can't put together the minimum 20 per cent deposit themselves.

From July 1 they would be able to secure a government-funded guarantee for homes valued at up to $150,000 more than the current cap.

With the polls pointing to a potential hung parliament, Mr Morrison was asked whether he would rule out a deal with so-called "climate independents" who are largely challenging sitting Liberal MPs.

"A vote for those independents is a vote for uncertainty, a vote for instability," he said.

© AAP 2022