The name galah is derived from gilaa, a word found in Yuwaalaraay and neighbouring Aboriginal languages; also known as the rose-breasted cockatoo. "Galah" is also derogatory Australian slang, synonymous with 'fool', 'clown' or 'idiot'. Because of the bird's distinctive bright pink, it is also used for gaudy dress.The galah nests in tree cavities. The eggs are white and there are usually two or five in a clutch. The eggs are incubated for about 25 days, and the male and female share the incubation. The chicks leave the nest about 49 days after hatching. The average lifespan of all galahs is about 40 years of age