“…These hair-pencils are spread erect when a male is perching in an exposed area, or when in chase with another individual (Pliske, 1975a;Edgar et al, 1976;Pliske et al, 1976). Scent diffusion from hair pencils is thought to play a role in courtship (M€ uller, 1879;Gilbert, 1969;Drummond, 1976;Pliske et al, 1976;Haber, 1978;Kaye, 2009), by disseminating aphrodisiac pheromones (Pliske, 1975a) and attracting both sexes to multi-species leks (Haber, 1978). It may also function in male-male repellency and territorial marking (Pliske, 1975b;Edgar et al, 1976;Pliske et al, 1976;Vasconcellos-Neto and Brown, 1982).…”