Cotton Harlequin bugs mass on a warm winter afternoon as they suck the sap from under the bark of a tree in Manly on Sydney's north shore June 20, 2005. The bugs, a member of the jewel bug family (Scutelleridae), are named for their bright metallic coloration. They are sometimes a minor pest of cotton and have been known to cause the introduction of a fungus, which rots the cotton boll. In gardens, they cause flower buds to drop prematurely. REUTERS/Will Burgess WB/NL