Plecoptera

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Plecoptera are an order of insects, commonly known as stoneflies. There are some 2,000 species worldwide.

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These are aquatic insects whose nymphs (immatures) live in streams (running waters) while the adults live in the air.

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Order: Order (from Latin ordo "row, rank, series, arrangement", Old French ordre from the Latin accusative, ordinem, attested in English from the 1220s). The word conveys a notion of "a system of parts subject to certain uniform, established ranks or proportions", an idea very central to scholastic thoug...

Species: In biology, the most commonly used definition of species was first coined by Ernst Mayr. Species are "groups of actually or potentially interbreeding natural populations which are reproductively isolated from other such groups" (however, see other definitions of species below)....