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Mayfly Species Maccaffertium vicarium (March Brown)

Pictures Below

This is page 2 of specimens of Maccaffertium vicarium. Visit the main Maccaffertium vicarium page for:

  • The behavior and habitat of Maccaffertium vicarium.

Pictures of 19 Mayfly Specimens in the Species Maccaffertium vicarium:

Specimen Page:123
Female Maccaffertium vicarium (March Brown) Mayfly DunFemale Maccaffertium vicarium (March Brown) Mayfly Dun View 6 PicturesHere's a classic March Brown dun from the Catskills.
Collected May 20, 2007 from the Neversink River in New York
Added to Troutnut.com by Troutnut on May 21, 2007
Maccaffertium vicarium (March Brown) Mayfly NymphMaccaffertium vicarium (March Brown) Mayfly Nymph View 4 PicturesI photographed this Maccaffertium vicarium nymph shortly after it molted to a new 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.) in my holding container. Many nymphs take on drastically different coloration immediately after molting, and this species is no exception.
Collected April 19, 2006 from the Beaverkill River in New York
Added to Troutnut.com by Troutnut on April 21, 2006
Male Maccaffertium vicarium (March Brown) Mayfly SpinnerMale Maccaffertium vicarium (March Brown) Mayfly Spinner View 5 PicturesThis spinner comes from a dun I collected and photographed earlier.
Collected May 28, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 24, 2006
Maccaffertium vicarium (March Brown) Mayfly NymphMaccaffertium vicarium (March Brown) Mayfly Nymph View 3 PicturesI keyed this nymph to Stenonema fuscom, which is now synonymized with Maccaffertium vicarium. However, the size, markings, and time of year make me very skeptical of this identification.
Collected June 9, 2005 from the Bois Brule River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006
Specimen Page:123
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