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The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county’s UF/IFAS Extension office. U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension. Introduction Notonecta glauca, the common backswimmer (Figure 1), is an aquatic insect in the family Notonectidae. Insects in this family are commonly referred to as backswimmers or greater water boatman. Notonectids propel themselves through the water with their ventral side (belly) facing upwards, hence their common name of backswimmers (Figure 2). Notonectids can inflict wounds to humans with their proboscis (mouthpart), but this is very rare and often is a result of rough handling.

Common Backswimmer Notonecta glauca (Linnaeus 1758) (Hemiptera: Notonectidae)