The Sooty Tern ranges over tropical and sub-tropical seas and on associated islands and cays around Northern Australia, with sporadic sightings on coasts in south-west and south-east Australia. In NSW only known to breed at Lord Howe Island. Occasionally seen along coastal NSW, especially after cyclones.
The species forages at sea and mostly eats crustaceans, cephalopods and fish. The Sooty Oystercatcher feeds by picking fish from the water surface, often conjugating in large flocks.
It rarely comes to land except to breed, and can stay out to sea for 3 to 10 years. Due to the lack oil in its feathers, it cannot float, and spends that entire time on the wing.
Birdlife Australia at http://birdlife.org.au/documents/MyTern-v7.pdf Accessed 27 July 2020.
Wikipedia. "Sooty Tern." Last modified 23 July 2020. https://en.wikipedia.org/wiki/Sooty_tern
NSW Office of Environment and Heritage. 2018. Sooty Tern - profile. Accessed 30 July 2020. https://www.environment.nsw.gov.au/threatenedspeciesapp/profile.aspx?id=...