For a local council, I am compiling a literature review on effects of festivals and other large events (people, music, food, cars, fireworks in different combinations and numbers) on nature (mainly birds, bats and mammals on/in the ground). These festivals are often organized in or near areas with natural values (city parks, nature or green areas close to cities). Regular papers can of course be found, but I hope there is ‘grey literature’ on this in different countries: case studies where not only assessments from literature have been made but where effects have been assessed and measured in the field. Suggestions, references, pdf’s are welcome!