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Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Mayfly Family Heptageniidae (March Browns, Cahills, Quill Gordons)

This is page 6846 of specimens of Heptageniidae. Visit the main Heptageniidae page for:

  • The behavior and habitat of Heptageniidae.
  • 11 underwater pictures of Heptageniidae.
  • 10 streamside pictures of Heptageniidae.

Specimens of the Mayfly Family Heptageniidae

49 Male Spinners
35 Female Spinners
2 Spinners
33 Female Duns
23 Male Duns
2 Duns
92 Nymphs
2 Adults
2 Male Adults


  • Arbona, Fred Jr. 1989. Mayflies, the Angler, and the Trout. Nick Lyons Books.
  • Mayo, V.K. 1952. New Western Ephemeroptera, IV, With Notes. The Pan-Pacific Entomologist 28(4): 179-186.
  • Needham, James G., Jay R. Traver, and Yin-Chi Hsu. 1935. The Biology of Mayflies. Comstock Publishing Company, Inc.
  • Slater, J. and Kondratieff, B.C. 2004. Review of the Mayfly Genus Cinygmula McDunnough (Ephemeroptera: Heptageniidae) in Colorado. Journal of the Kansas Entomological Society 77(2): 121-126.
» Family Heptageniidae (March Browns, Cahills, Quill Gordons)
Genus in Heptageniidae
CinygmaWestern Light Cahills424
CinygmulaDark Red Quills41262
EcdyonurusWestern Ginger Quills319
EpeorusLittle Maryatts57348
StenacronLight Cahills848
StenonemaMarch Browns and Cahills66328
4 genera (Anepeorus, Macdunnoa, Raptoheptagenia, and Spinadis) aren't included.
Identification Keys
Family Range
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