Visuals Unlimited / Strawberry Poison Arrow Frog (Oophaga pumilio) rear view climbing up plant, Costa Rica. These frogs have neurotoxins that are exuded through the skin. The bright colours are a warning to potential pre...
Adrian Davies / Mild Milkcap Fungus (Lactarius subdulcis) with milk being exuded from damaged gills. Surrey, England, UK, November.
Adrian Davies / Milk cap fungus (Lactarius sp) showing drops of white milky fluid exuded from damaged gills, Surrey, England, November
Stephen Dalton / Yellow fever mosquito (Aedes sp) taking blood from human, Note drop of clear liquid being exuded, from the east coast of South Africa
Mark Moffett / Dinosaur Ant (Nothomyrmecia macrops) worker guarding scale insects that have exuded so much honeydew that they appear to be covered in sugar, Poochera, Australia
Nigel Cattlin / Large flower heads of Euphorbia characias 'Black Pearl' plant in full flower, Berkshire, April Berkshire, England, UK.
Mark Moffett / Carpenter Ant (Camponotus sp) group protect sprouting bamboo in return for exuded sweet sap, Malaysia