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.

Back to: Aquatic Macros Index

Mayfly Families
Ameletid | Small Minnow | Spiny Crawler | Flat-headed | Prong-gill


Spiny Crawler Mayfly (Family Ephemerellidae)
Tolerance: sensitive

41.jpg
41.jpg
(7 mm)
East Fork Lewis River
Lewisville Park
May 2004

42.jpg
42.jpg
(7 mm)
East Fork Lewis River
Lewisville Park
May 2004

spiny crawler mayfly
up_efl_7.jpg
(8 mm)
East Fork Lewis River
upper watershed
September 2005

ef_f04-52
ef_f04-52.jpg
(5 mm)
East Fork Lewis River
Lewisville Park
Sep. 29, 2004

spiny crawler mayfly
up_efl_20.jpg
(8 mm)
East Fork Lewis River
upper watershed
September 2005

thumbs/161.jpg
161.jpg

East Fork Lewis River
Daybreak Park
June 2004

122.jpg
122.jpg
(8 mm)
Salmon Creek
Hockinson, WA
May 2004

123.jpg
123.jpg
(8 mm)
Salmon Creek
Hockinson, WA
May 2004

spinycrawler
lena_jul06-0587.jpg
Lena Cr.
Hoods Canal

July 2006

spiny crawler
lena_jul06-0881.jpg
Lena Cr.
Hoods Canal
July 2006

 

spiny gills
lena_jul06-0849.jpg
gills & abdomen detail
Lena Cr.
July 2006

125.jpg
125.jpg
(10 mm)
Salmon Creek
Hockinson, WA
May 2004

126.jpg
126.jpg
(10 mm)
Salmon Creek
Hockinson, WA
May 2004

127.jpg
127.jpg
(10 mm)
Salmon Creek
Hockinson, WA
May 2004

spiny crawler mayfly
up_efl_28.jpg
(3 mm)
East Fork Lewis River
upper watershed
September 2005
spiny crawler mayfly
up_efl_141.jpg
(4 mm)
East Fork Lewis River
upper watershed
September 2005

spiny crawler mayfly
up_efl_34_1a.jpg
(4 mm)
East Fork Lewis River
upper watershed
September 2005

spiny crawler mayfly
efl4-03-05_81.jpg
(15 mm)
East Fork Lewis River
Lewisville Park
March 2005

spinycrawler
lena_jul06-0849.jpg
Lena Cr.
Hoods Canal
July 2006


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.)

Back to:Aquatic Macros Index


modified: 11/4/06