Original - A female subimago of March Brown Rhithrogena germanica which is a faunistic rarity and on the red list of endangered species
 
Edit 1 - Cropped out excessive empty space to make image more suitable for use in articles
Reason
Very crisp and clear example of a Mayfly
Articles this image appears in
Mayfly
Creator
--Richard Bartz (talk) 16:03, 10 April 2008 (UTC)[reply]
According to the image page, it's a field horsetail. Matt Deres (talk) 18:08, 11 April 2008 (UTC)[reply]

Promoted Image:Ephemeroptera on Equisetum arvense.jpg MER-C 10:08, 18 April 2008 (UTC)[reply]