1. Rothamsted Research; West Common Harpenden Hertfordshire AL5 2JQ UK
2. Royal Society of Biology; Charles Darwin House, 12 Roger Street London WC1N 2JU UK
3. Centre for Behaviour and Evolution; Institute of Neuroscience; Newcastle University; Newcastle upon Tyne NE1 7RU UK
4. Environment and Sustainability Institute; University of Exeter; Penryn Campus Penryn Cornwall TR10 9FE UK