The Senate’s environment committee is set to hear evidence about Cleveland’s controversial Toondah Harbour project and the impact of over-development on Queensland’s threatened koala population in Brisbane on Friday.

It has also received a submission from Queensland’s Black Throated Finch Recovery Team as both state and federal governments assess Adani’s Carmichael coal mine in the Galilee Basin.

Walker Group's June 2018 plan for Cleveland's Toondah Harbour.

The koala is classified as vulnerable under both Queensland and Australian government legislation, however in south-east Queensland a number of reports say populations are declining towards extinction.

Koala numbers in the Redlands have declined by 80 per cent in the past decade.