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Mayflies
(Phylum Arthropoda, Class Insecta, Order Ephemeroptera) |
Instructions: For a larger view of the specimens below, click on an image. The enlarged image will appear on your screen in a new window. Close this new window when you are through viewing it. Further information on the identification and ecology of aquatic macroinvertebrates can be found from the materials mentioned on the Macro Resources page.
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Flat-headed Mayfly (Family Heptageniidae)
Tolerance: moderate |
32.jpg
(6 mm)
East Fork Lewis River
Lewisville Park
May 2004
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34.jpg
(6 mm)
genus: Cinygmula*
East Fork Lewis River
Lewisville Park
May 2004
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vb_w04-34.jpg
(4 mm)
genus: Cinygmula*
Salmon Cr. tributary
Venersborg, WA
December 2004
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vb_w04-62.jpg
(4 mm)
genus: Cinygmula*
Salmon Cr. tributary
Venersborg, WA
December 2004 |
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ef_f04-53.jpg
(5 mm)
genus: Rhithrogena*
East Fork Lewis River
Lewisville Park
Oct. 5, 2004 |
33.jpg
genus: Rhithrogena*
East Fork Lewis River
Lewisville Park
Fall 2003 |
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ef_f04-55.jpg
(7 mm)
East Fork Lewis River
Lewisville Park
Oct. 5, 2004 |
162.jpg
East Fork Lewis River
Daybreak Park
June 2004 |
163.jpg
East Fork Lewis River
Daybreak Park
June 2004 |
up_efl_34.jpg
(8 mm)
East Fork Lewis River
upper watershed
September 2005 |
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115.jpg
(9 mm)
Salmon Creek
Hockinson, WA
May 2004 |
116.jpg
(9 mm)
Salmon Creek
Hockinson, WA
May 2004 |
113.jpg
(9 mm)
Salmon Creek
Hockinson, WA
May 2004 |
114.jpg
(9 mm)
Salmon Creek
Hockinson, WA
May 2004 |
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vb_w04-21.jpg
(10 mm)
genus: Ironodes*
Salmon Cr. tributory
Venersborg, WA
December 2004 |
vb_w04-22.jpg
(10 mm)
genus: Ironodes*
Salmon Cr. tributory
Venersborg, WA
December 2004 |
vb_w04-23.jpg
(10 mm)
genus: Ironodes*
Salmon Cr. tributory
Venersborg, WA
December 2004 |
grays_aug06-1117.jpg
genus: Epeorus*
Grays River
August 2006
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109.jpg
(5 mm)
genus: Epeorus *
Salmon Creek
Hockinson, WA
May 2004 |
110.jpg
(5 mm)
genus: Epeorus*
Salmon Creek
Hockinson, WA
May 2004 |
111.jpg
(5 mm)
genus: Epeorus*
Salmon Creek
Hockinson, WA
May 2004 |
106.jpg
(6 mm)
genus: Epeorus*
Salmon Creek
Hockinson, WA
May 2004 |
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| Note from author: Considerable effort has been made to be as accurate as possible in the identification of the organisms. While I am fairly confident of the ID (at least for the major taxon levels), I cannot guarantee complete accuracy. In particular, you will notice that some organisms are labeled with a (*). This indicates a probable classification based on general traits (shape, size and color) of the organism and location from which it was found. I do not possess the level of expertise nor did I conduct the kind of detailed inspection to provide a conclusive ID -- consider these efforts at classification as my "best guess" based on available information and, in some instance, outside assistance. (If you notice any errors or omissions, please contact me at the email address provided at the bottom of this page.) |
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Back to: Aquatic Macros Index
modified: 11/4/06
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