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


Small Minnow Mayfly (Family Baetidae)
Tolerance: tolerant

43.jpg
43.jpg

East Fork Lewis River
Lewisville Park
Fall 2003

macro - 44
ef_f04-42.jpg
(2 mm)
East Fork Lewis River
Lewisville Park
Oct. 5, 2004

macro - 44
ef_f04-43.jpg
(4 mm)
East Fork Lewis River
Lewisville Park
Sep. 29, 2004

39.jpg
39.jpg
East Fork Lewis River
Lewisville Park
Fall 2003
40.jpg
40.jpg
East Fork Lewis River
Lewisville Park
Fall 2003
macro - 44
ef_f04-44.jpg
East Fork Lewis River
Lewisville Park
Sep. 29, 2004
macro - 44
ef_f04-45.jpg
East Fork Lewis River
Lewisville Park
Sep. 29, 2004

macro - 44
ef_f04-77.jpg
(5 mm)
East Fork Lewis River
Lewisville Park
Nov. 19, 2004

macro - 44
ef_f04-78.jpg
(5 mm)
East Fork Lewis River
Lewisville Park
Nov. 19, 2004

72.jpg
vb_w04-63.jpg
(4 mm)
Salmon Cr. tributary
Venersborg, WA
December 2004

72.jpg
vb_w04-65.jpg
(4 mm)
Salmon Cr. tributary
Venersborg, WA
December 2004

ef_f04-46
ef_f04-46.jpg
(6 mm)
East Fork Lewis River
Lewisville Park
Oct. 5, 2004

ef_f04-47
ef_f04-47.jpg
(6 mm)
East Fork Lewis River
Lewisville Park
Oct. 5, 2004
ef_f04-48
ef_f04-48.jpg
(6 mm)
East Fork Lewis River
Lewisville Park
Oct. 5, 2004
36.jpg
36.jpg

(10 mm)
East Fork Lewis River
Lewisville Park
May 2004
37.jpg
37.jpg

(10 mm)
East Fork Lewis River
Lewisville Park
May 2004
38.jpg
38.jpg

(10 mm)
East Fork Lewis River
Lewisville Park
May 2004
diphetor
efl3-30-05_26.jpg
Diphetor
(9 mm)
East Fork Lewis River
Lewisville Park
March 2005
       

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: 9/23/06