WASHINGTON (REUTERS) - US President Joe Biden and Australian Prime Minister Scott Morrison discussed how they can work together to deal with China and a recent military coup in Myanmar, the White House said on Thursday (Feb 4).

The first call between the leaders since Mr Biden's inauguration comes amid heightened tension between Australia and China and just days after Myanmar's military seized power in a coup against the democratically elected government of Nobel laureate Aung San Suu Kyi.

The strength of the US-Australia alliance "remains an anchor of stability in the Indo-Pacific and the world", the White House said in an e-mailed statement.

The two leaders talked about beating the Covid-19 pandemic, combating climate change and working together to hold responsible those behind the coup in Myanmar, the White House said.

Mr Morrison declined to give details of the conversation with Mr Biden about China and Myanmar.

"He said to me again today, he sees the Australia-US relationship as providing the anchor for peace and security in our region," Mr Morrison told reporters in Canberra.

The United States is Australia's key strategic ally, a relationship that Mr Morrison made a priority as ties between Canberra and China, its largest trading partner, soured.

The new US administration's emphasis on addressing climate change is likely to put pressure on Mr Morrison, who has been hesitant to match Mr Biden's commitment to net zero emissions by 2050.

Mr Morrison, however, said the call was warm and engaging.

Mr Morrison's predecessor Malcolm Turnbull had a testy first phone call with previous US president Donald Trump, who said it was the "worst call by far" according to The Washington Post.

The call turned hostile after Mr Turnbull pressed Mr Trump to honour a previous agreement that Canberra made with the Obama administration to accept refugees from Australian offshore detention camps.