Tern watches have spotted them in the estuary and marina.
Fairy Tern make up the 50 species of rare bird thought to be in the Mandurah area.
No terns have been spotted yet at the special Mandurah Fairy Tern Sanctuary at Mandurah Quays.
Mandurah CEO Mark Newman said the public are asked to keep their distance from the sanctuary fence and breakwater wall behind the site.
“Disturbance early in the season will deter them from nesting; but once they’ve settled, they’re a bit more resilient,” he said.
“If you are walking your dog in the vicinity make sure it is on the lead, and any pet cats in the area must be contained."
The Sanctuary was established by the City of Mandurah and multiple project partners to provide a safe nesting space nearby the 2016-2017 nesting site on a then-vacant development Lot.
A number of Fairy Terns flew repeatedly over the Sanctuary last year after it was completed, which authorities said was a good sign and confirmed ecological advice that it could take up to three seasons for a colony to successfully nest within the site.
Anyone interested in being involved in the conservation of this Threatened Species or assist in the important university research on Fairy Terns commencing next month, can do so by contacting the City’s Environmental Services.
Police issue 31,000 driving infringements in first month of new AI cameras
Works underway on Rockingham and Safety Bay High School redevelopments
New measles exposure sites revealed in Bunbury
Dawesville man charged after allegedly leaving his elderly Great Dane to suffer painful conditions
Good Samaritan sought by police after helping teen during robbery in Baldivis
Under-16s social media ban now in force
Desperate search continues for missing Bunbury FIFO worker
Passengers now able to use credit, debit cards to tag on and off WA's public transport
New floating jetty speeds up emergency response times for Marine Rescue Mandurah