This paper focuses on how to generate urban bio-corridors within the framework of the Synergetic Landscapes Project. The project is set up to deal with the problematique of the relationship between human and urban wildlife in Grangetown, Cardiff, Wales, UK. The paper discusses the research on the context of the bio-corridor on a more general level. Based on this, the urban proposal for Grangetown is pointed out, and potential bio-corridors in Grangetown are suggested. Lastly, the paper proposes a prototype called Possible Fabrication as one of more possible leverage points for the urban proposal. Gigamapping is used as a tool for the whole design and research process.