Silver gull / Silberkopfmöwe (Chroicocephalus novaehollandiae)

Wikipedia eBird Xeno-Canto

Silver gulls. 2007-12-14 11.03.10 Australia
Classification: Genus Chroicocephalus; Subfamily Larinae; Family Gulls (Laridae)
General: The silver gull (Chroicocephalus novaehollandiae or Larus novaehollandiae) is the most common gull of Australia. It has been found throughout the continent, but particularly at or near coastal areas. It is smaller than the Pacific gull (Larus pacificus), which also lives in Australia. [more]

First documented observation : 2007-12-14 in Australia.