This report maps for the fourth consecutive year bilateral finance institutions’ climate financial flows to developing countries. During 2011 the members of the working group accounted for nearly US$10 billion of climate change finance to developing countries and 13 per cent of all public climate finance; 74 per cent of these funds were allocated to mitigation and 26 per cent to adaptation. While all member institutions provide more financing for mitigation, they all increased the proportion of total climate finance allocated to adaptation in 2011. The financial data reported and analysed in this report is provided by the participating finance institutions through a financial survey and interview process, as part of a global effort to make available comparable, transparent and accurate data on financing to address climate change mitigation and adaptation in developing countries.