Online small ads advertising Javan pied starlings (Gracupica contra jalla) for sale in the metropolitan area of Jakarta, Indonesia. Numbers indicate locations at which more than one advertisement was posted (within < 100 m distance). Data collected between 1 February and 15 May 2020 from https://olx.com.id. Background map: Stamen Design (CC-BY-3.0), map data: OpenStreetMap (CC-BY-SA).