Abstract Background Male sexually selected vocalisations generally contain both individuality and quality cues that are crucial in intra- as well as inter-sexual communication. As individuality is a fixed feature whereas male phenotypic quality changes with age. individuality and quality cues may be subjected to different selection pressures over time. Individuality (for example. https://macorners.shop/product-category/acrylic-first-day-of-school-sign/