SOMMAIRE:A planner's plan for Louisiana's wildlife areas; among "resilience officers" shock and stress are in the job description; Dirk Sijmons parses energy landscapes; and remembering Bill Callaway of SWA Group.Edited By Adam Regn Arvidson, FASLA-Among the short-lived opossum's many defenses are an ability to destroy ticks and turn back a viper's venom; plus, pawpaws, the native smoothie on a tree.By Constance CaseyDry on a Good Day-The genius of the century-old Miami Conservancy District in Ohio is that it pairs flood control and land protection without politics.By Kevan WilliamsStrange Companions-Landing Studio turned a Massachusetts salt port from an obstacle to an attraction.By William S. Saunders-The actively beautiful surface.By Lisa SpeckhardtFEATURES66 No, No, You Go First-Kids are right to be a bit scared at new playgrounds designed by Taylor Cullity Lethlean and James Mather Delaney. It's good for them.By Gweneth Leigh, ASLA82 This is a Test-On a green roof at the Chicago Botanic Garden by Oehme, van Sweden, plant failure is as important as success.By Lauren Mandel, Associate ASLA94 So Cal-Mia Lehrer + Associates' new garden at the Natural History Museum of Los Angeles County is a paean to nature the city has lost.By Jennifer Reut