Hundreds of leaders, experts, partners, and supporters of the International Union for Conservation of Nature gathered on the sidelines of the Sixteenth Conference of the Parties to the UN Convention on Biodiversity in Cali, Colombia on 28 October to celebrate the 60th anniversary of the IUCN Red List of Threatened Species and to chart an ambitious path forward for expanding the critical indicator of the health of the world’s biodiversity – the “barometer of life”.