GUBIC is a multidisciplinary global analysis of how urbanization shapes and is shaped by the movement of species around the world. We aim to uncover how environment, city structure, biogeography, history, trade, economics and governance all shape the biodiversity of cites and the environmental benefits to people. GUBIC consists of more than 70 collaborators from more than 40 cities in 21 countries. GUBIC provides a platform to share data and ideas, and to get researchers together for collaboration and discussion.