The Friends of Five Islands group, along with the Foundation for National Parks and Wildlife, have been working to improve the seabird habitat around the islands off Port Kembla.

The National Parks and Wildlife Service has also been involved since last April, to remove invasive weeds and regenerate the native species which benefit the seabirds, working in a trial zone which will now be expanded to the whole of Big Island.

NPWS ranger Rowena Morris said the work done by the Friends of Five Islands had helped the birds, which struggle when long grass and weeds take over their nesting areas.

"Little penguins, shearwaters and oystercatchers are digging burrows or nesting in vegetation on Five Islands Nature Reserve," Dr Morris said.

"We have all seen great improvements at the reserve and are inviting more people to participate."

Regenerators are also hoping to gather historical photographs of Big Island.

"Photos of Big Island will help us understand changes there over past decades," Friends of Five Islands ecologist Kevin Mills said.

"Hill 60, overlooking the island, has been a favourite vantage point for many years and interesting photographs of the island have no doubt been taken from there."

Community members are now being invited to join in the regeneration project.

A seminar will be held by National Parks at the City Beach Function Centre, Wollongong, from 6.30pm on Thursday, March 5, to discuss volunteering.

Anyone who is interested should contact five.islands@environment.nsw.gov.au or 4223 3000.