University of Sydney scientists estimate one billion animals have been killed in the fires.
Morrison said his government was developing a national disaster risk reduction framework within the Department of Home Affairs that will deal with wildfires, cyclones, floods and drought.
Kean said, "This is the most widespread food drop we have ever done for brush-tailed rock-wallabies", adding that they are also installing cameras to monitor food uptake.
"We want to reduce emissions and do the best job we possibly can and get better and better and better at it", he said.
He said Morrison said the fires had made his government "a little harder" in offering comfort and comfort to the victims.
However, the bushfire had started since last September in Australia.
Since October, 27 people have been killed in Australia and thousands subjected to repeat evacuations as huge and unpredictable fires scorched more than 10.3 million hectares (25.5 million acres), an area roughly the size of South Korea. At least 28 people have died due to this fire.
With a forest area covering 20 percent of its total land area, Australia is not a stranger to wildfires.
Spokeswoman Carrie Bilbao said the firefighters were receiving training on Australia's many insects and poisonous snakes ahead of their mission.
Authorities are using relatively benign conditions forecast in southeeast Australia for a week or more to consolidate containment lines around scores of fires that are likely to burn for weeks without heavy rainfall.
This second big fire - after that of Gospers Mountain, which has been raging in the west of Sydney and burnt an area equivalent to seven times the area of Singapore - has led to concerns among authorities, along with the possibility of other fires fusing, despite recent rainfall that was, however, insufficient to control the blazes. That comes on top of a separate Aus$2 billion ($1.4 billion) national recovery fund earmarked to help devastated communities.
Smoke has drifted across the Pacific, affecting cities in South America, and may have reached the Antarctic, the U.N.'s World Meteorological Organization said.