Cane toad monitoring will be among priorities at Towra Point, as authorities continue the battle to protect migratory shorebirds from a range of threats.
Human disturbance, weed infestation, feral animals such as foxes and deer, and habitat loss are among other threats to visiting birds, including the endangered Eastern Curlew and Little Tern.
The federal government has given a $1.5 million grant to help with the work.
The funding will be provided over five years through the federal government's National Landcare Program to the state government agency, Greater Sydney Local Land Services.
Greater Sydney Land Services manager Paul Bennett said shorebird roosting sites would be improved through the removal of weeds, sandbagging and other activities.
"We will also plant more of the native species on the site and continue to monitor and manage pest animals in the area, which include foxes and deer," he said.
"Cane toad monitoring will also be a priority."
Sutherland Shire Council's website says a cane toad outbreak at Taren Point in 2010 presented an extreme risk to the local environment including the environmentally significant wetlands in the Woolooware Bay and Towra Point.
A control program saw approximately 500 cane toads removed in the first two years, and none had been sighted in the shire since 2014, the council said.
The new work at Towra Point will incorporate an Aboriginal employment program in partnership with the La Perouse Local Aboriginal Council (LAC).
"We will engage the LAC's green team to deliver bush regeneration, weed control and help maintain Aboriginal places on the site," Mr Bennett said.
Towra Point wetlands are listed under the Ramsar Convention as a site of international importance, containing around 60 percent of saltmarsh and 40 percent of mangrove communities in the entire Sydney region.
It provides critical roosting and feeding habitat for a high volume of migratory shorebird species including the endangered Eastern Curlew and Little Tern.
Mr Bennett said the proximity of the wetlands to the Sydney CBD meant the site had to be carefully managed and protected.
"The site is just 16 kilometres from the city centre which brings a number of management challenges," he said.
"However this funding will help us to build on previous work to protect and preserve the site including habitat improvement, weed and feral animal control and community engagement and education."
Other project partners include NSW National Parks and Wildlife Service, Sutherland Shire Council, NSW Wader Birds Group and local schools.
