Book excerpt: Includes chapters on assessing changes among assemblages and in individual species, the variety of general threats (notably habitat changes and impacts of alien species) and more particularly urban threats. The first global overview and synthesis of the impacts of urbanisation on insects and their relatives and the needs and theoretical and practical background to conserving them in urban environments. Insect dependence on open spaces in built-up areas suggests a wide range of management options for conservation, from individual site (including novel habitats such as green roofs) to landscape-level connectivity. These measures, all discussed with specific examples, involve all sectors of humanity, from government agencies to individual householders and ‘citizen scientist’ groups. Each chapter includes pertinent and recent.