The rate of land clearing in northern NSW more than tripled after the Berejiklian government eased native vegetation protection in 2017 to the rate of about 14 football fields of koala habitat per day, a new report has found.

The report, compiled by WWF and the Nature Conservation Council using satellite imagery, was released on Friday to coincide with National Threatened Species Day.

The 22,000 square-km region studied, west of Moree, had been a focus of intensive land clearing – legal and illegal – even prior to last year's repeal of the Native Vegetation Act, Wendy Hawes, an ecologist, said.

Satellites are revealing how quickly trees are being bulldozed.

"It's revved up since the new legislation," said Ms Hawes, who is principal ecologist at the Envirofactor consultancy. Tree cover in the areas was less than 30 per cent about six years ago and "it'll be amazingly small now", she said.