Map

Flyfishing Entomology

Adult Mayfly Identification

# of tails:
Body length:   (excluding tails)
Fore wings:
Hind wings:
Other distinguishing characters:
Emergence water type:
Emergence behavior:
Emergence light conditions:
Geographic location:
North America geographic locations are per Mayfly Central map.
Western Europe geographic locations are by country.

This page supports identification of mayfly subimagos (duns) and imagoes (spinners) to genus level. Click the blue button to the right of each selection box to display the available choices, and then click on the appropriate choice. If uncertain, use the question mark. After selection, click the Lookup button for tabular display of the most likely candidate(s).

Note: JavaScript is used to analyze selections and display results for this page. If the browser you are using does not support JavaScript, or if scripting has been disabled, nothing will happen when you click Lookup. To remedy this in (IE 6.0), go to Tools/Internet Options/Advanced (tab) Security options, and place a checkmark in the box for Allow active content to run in files in My Computer.

Created: 02/20/2004 Last modified: 03/01/2008 www.FlyfishingEntomology.com