It's estimated that NSW has between 26,000 and 32,000 koalas.
However, Cleary says she expects koala numbers in some areas to have fallen after this year's hot weather and bushfires.
This year's 10-day koala count is the first of what the National Parks Association hopes will be an annual study helping scientists track the impacts of climate change, people and weather.
More than three weeks after bushfires tore through the Blue Mountains, the region's mayor says not a single destroyed property has been cleaned up by state or federal authorities.
Prime Minister Tony Abbott and NSW Premier Barry O'Farrell granted affected communities access to disaster assistance after 203 families lost homes to fires around Springwood, Winmalee, Lithgow and Mt Victoria.
The massive fire complex west of Sydney tore through more than 50,000ha of bushland, forcing schools to close and hundreds of locals to flee.
But Blue Mountains Mayor Mark Greenhill says none of 210 properties destroyed by fire have been cleared.
He says families that lost everything are "sitting around waiting for something to happen" because rebuilding has stalled.
- AAP