Baetidae (Blue-Winged Olives) Mayfly Nymph Pictures

Mayflies

Caddisflies

Stoneflies

Classification

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Baetidae (Blue-Winged Olives)

This mayfly was collected from the Namekagon River on January 13th, 2004 and added to Troutnut.com on January 25th, 2006.

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This gives a pretty good idea of the size of these early-instar Baetid nymphs in January. Baetidae (Blue-Winged Olives) Mayfly Nymph from the Namekagon River in Wisconsin

This gives a pretty good idea of the size of these early-instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.) Baetid nymphs in January.

AuthorTroutnut

CameraOlympus C740UZ

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Baetidae (Blue-Winged Olives) Mayfly Nymph from the Namekagon River in Wisconsin

AuthorTroutnut

CameraOlympus C740UZ

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Jargon Defined:

Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.

Nymphs: The juvenile, underwater stages of mayflies, stoneflies, dragonflies, and damselflies and other aquatic insects whose juvenile stages are covered by hard exoskeletons. The word can also refer to the fishing flies which imitate these creatures, in which case it is used as a blanket term for flies imitating any underwater stage of an invertebrate (except for crayfish and leeches).