Baetisca laurentina (Armored Mayfly) Mayfly Nymph Pictures

Mayflies

Caddisflies

Stoneflies

Classification

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Baetiscidae (Armored Mayflies)

» Genus Baetisca (Armored Mayflies)

» Species laurentina (Armored Mayfly)

I took a few group picture of a bunch of Baetisca laurentina nymphs to show the degree of individual variation in size, color, and shape that can occur within the same species in the same pool of the same river. This variation is one important reason why trout are forgiving of some small degree of variation in our imitations--the naturals themselves vary, too.

This mayfly was collected from the Upper Midwest on March 1st, 2004 and added to Troutnut.com on January 25th, 2006.

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CameraOlympus C740UZ

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CameraOlympus C740UZ

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CameraOlympus C740UZ

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Jargon Defined:

Naturals: A natural is a real insect (or similar creature) a trout might eat. The term is used to specify the real thing as opposed to its artificial imitation.

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).

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