Water boatman

Water boatman, as a type of insect, can mean:

• In the USA, Corixidae: the majority of species are herbivorous, but some species may eat small animals such as tadpoles. They inhabit ponds and slow moving streams, where they swim right-way-up near the bottom.
• In Britain, it can also mean the Notonectidae (called backswimmers in the USA): these swim upside-down on the surface and are predators. They swim with two long legs that look like oars.

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