Clare Newton (author) , Dr. Alan Rayner (author of introduction) , Emma Marsh MAPM FRSA (author of contributions) , Dr. Kate A. Hardwick (author of contributions) , Dr. Javier Carrillo-Hermosilla (author of contributions) , John Parker Technical Director at the Arboricultural Association (author of contributions) , Lauren Davies Chair Swarm Dynamics. (author of contributions) , CL Newton (inset photographer)