https://en.wikipedia.org/wiki/Splendid_fairywren#Courtship

Another interesting habit of males of this and other fairywren species during the reproductive season is to pluck petals (in this species, predominantly pink and purple ones which contrast with their plumage) and show them to female fairywrens. Petals often form part of a courtship display and are presented to a female in the male fairywren’s own or another territory. Outside the breeding season males may sometimes still show petals to females in other territories, presumably to promote themselves.