Which family includes aquatic bugs that commonly swim upside-down, with the body tilted and head downward at the surface?

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Study for the Science Olympiad Entomology Exam. Dive into entomology with flashcards and multiple-choice questions. Each question comes with hints and explanations to help you ace your exam!

Multiple Choice

Which family includes aquatic bugs that commonly swim upside-down, with the body tilted and head downward at the surface?

Explanation:
Notonectidae, the backswimmers, are known for swimming upside-down at the water surface. They tilt their bodies so the head points downward toward the bottom while the underside faces upward toward the air. This orientation, combined with propulsion by their hind legs, keeps them just beneath the surface as they hunt. They also carry a small air reserve that helps them breathe underwater. This distinctive inverted swimming behavior sets them apart from the other families, which do not habitually swim inverted at the surface.

Notonectidae, the backswimmers, are known for swimming upside-down at the water surface. They tilt their bodies so the head points downward toward the bottom while the underside faces upward toward the air. This orientation, combined with propulsion by their hind legs, keeps them just beneath the surface as they hunt. They also carry a small air reserve that helps them breathe underwater. This distinctive inverted swimming behavior sets them apart from the other families, which do not habitually swim inverted at the surface.

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