I discovered a few of these while cleaning an outdoor fish pond north of Sacramemto California. What is this?enter image description hereenter image description here

  • 2
    $\begingroup$ Check the species ID tag info for some ways you can improve your species ID question to help get a good answer. $\endgroup$
    – Bryan Krause
    Commented May 3, 2019 at 23:16
  • $\begingroup$ mayfly nymph of ephemoptera species $\endgroup$ Commented May 4, 2019 at 6:40
  • $\begingroup$ Wonderful! Now I will go intimidate my friends with this knowledge. Thank you! $\endgroup$ Commented May 4, 2019 at 8:30

1 Answer 1


This is a Burrowing Mayfly nymph (order Ephemeroptera), more than likely of the family Ephemeridae. The Bugguide site has very few photos of nymphs, but you'll find a near miss here (the species shown is not Californian, but the related Ephemera simulans Walker, 1853 is; see here for other possibilities [you'll want to look for nymph photos of the species listed from "USA: SW"]).


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