Paul Bertner / Green Tree Ant (Oecophylla smaragdina) carrying each other to conserve energy, Cat Tien National Park, Vietnam

Paul Bertner / Green Tree Ant (Oecophylla smaragdina) pair carrying each other to conserve energy, Cat Tien National Park, Vietnam

Paul Bertner / Fruit Fly (Dacus longicornis) pair, wasp mimics, Cuc Phuong National Park, Vietnam

Paul Bertner / Fruit Fly (Dacus longicornis), wasp mimic, Cuc Phuong National Park, Vietnam

Paul Bertner / Ant (Odontomachus sp), Cat Tien National Park, Vietnam

Paul Bertner / Ant (Odontomachus sp), Cat Tien National Park, Vietnam

Paul Bertner / Black Widow Spider (Latrodectus sp) mother and spiderlings, Cuc Phuong National Park, Vietnam

Paul Bertner / Flattie (Selenopidae) spider camouflaged on tree, Cuc Phuong National Park, Vietnam

Paul Bertner / Ant (Polyrhachis pubescens), Bach Ma National Park, Vietnam

Paul Bertner / Ant (Polyrhachis pubescens), Bach Ma National Park, Vietnam

Paul Bertner / Tiger Leech (Haemadipsa picta), Bach Ma National Park, Vietnam

Paul Bertner / Harvestman, Cat Tien National Park, Vietnam