Operation Rainbow Roost is a BirdLife Western Australia project aimed at locating roosting sites for the introduced Rainbow Lorikeet (Trichoglossus haematodus). Since the 1960’s when the species was introduced to Perth as 10 individuals, the population has increased to over 40,000. Their range in the southwest of Western Australia has also increased rapidly and they now extend from Yanchep to Mandurah and Chidlow, to the east. There have also been small localised outbreaks in other parts of the southwest.