Introduction Habitats and wildlife issues are a key consideration for many development projects in England and Wales. Ecological constraints can influence the suitability of a site for development, affect project design, require changes to construction programmes and, in some cases, prevent development from proceeding without appropriate mitigation, compensation or licensing. This checklist provides a practical guide to the principal habitats and wildlife issues that developers and their advisers should consider throughout the development process, from site acquisition and due diligence through to design, construction and long-term habitat management. It is intended to help identify potential ecological constraints at an early stage, reduce the risk of delays and ensure that appropriate advice is obtained where necessary. This checklist is not intended to provide a comprehensive statement of the law. Instead, it highlights the principal issues that should be considered during a development project and signposts readers to the relevant Lexis+ Practical Guidance content for more detailed information on specific topics, including planning applications, biodiversity net gain, protected species, Habitats Regulations Assessment, environmental impact assessment and wildlife