I saw this video on the Moldy Chum’s Blog and on Mountain River Journal’s Blog and found it to be quite informative and very well done. As it is of mayflies I thought it fitting to post it here for my future reference. Note: The nymphs in the beginning are defiantly in the burrowers category note the tusks and if I’m correct these are Ephemera guttulata. My reasons for this identification are the shape of the tusk on the nymphs, and the distinct light yellow gill section and the much darker abdomen. Also the duns appear to match the larger size and color of the guttulata. Unfortunately, these do not inhabit my waters.