Cape Town reached first place in the 2019 iNaturalist City Nature Challenge in two out of the three categories: Most Observations, and Most Species. This was the first entry by Capetonians in this annual competition to observe and record the local biodiversity over a four-day long weekend during what is considered the worst time of the year for local observations. However, a worldwide survey showed that the extinction rate of endemic plants from the City of Cape Town is one of the highest in the world, at roughly three per year since 1900 - partly a consequence of the very small and localised habitats and high endemicity.