• 3 genera and 32 species in North America
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hemiptera |
Family: | Notonectidae |
Identification Tips:
• Length 5-17 mm
• Rear legs greatly elongated with 'paddles' made of hairs at the ends
• Swims upside down most of the time; strong swimmer
• Lighter coloured on back than front
Life History:
• Most common in small ponds or near shores of lakes
• Found in quiet water of all aquatic habitats, including brackish water, sewage lagoons, ditches, and hotsprings
• Prey on small insects, crustaceans, snails and sometimes fish fry and tadpoles
• Hold prey with spiny front legs, pierce it with beak and sucks our bodily juices
• Can inflict painful bites on humans
• Breathe air, carrying air bubble in troughs on side of abdomen while diving
• Adults are strong flyers and may disperse considerable distances
• Usually 2 generations per year
• Lay eggs on submerges plants or rocks
POLLUTION TOLERANCE | ||||
Very Sensitive | Somewhat Sensitive | Facultative | Somewhat Tolerant | Very Tolerant |
Most |
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Primary Information Source:
Voshell, J. Reese. 2002. A Guide to Common Freshwater Invertebrates of North America. McDonald and Woodward Publishing Company. Blacksburg, Virginia.