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This mayfly is just over 1" long.
Tropical dry forest in NW Costa Rica. There are two small streams near the photo location. Since this is the end of the rainy season the water flow is reduced and the food sources for the nymphs are ample. There are 6 - 8 months when the creeks have no water. This does not allow for many mayflies to be produced during a given year in this area.
I have no experience with mayflies. Basic research has given me the following genus in Costa Rica (note that most are from 50 meter elevation (carribbean side) to over 1000m elevation) - Ableptemetes , Baetodes, Leptohyphes, Thraulodes, Tricorythodes
Spotted on Nov 19, 2012
Submitted on Oct 29, 2014
2 Comments
Thanks!
I don't know much about mayflies outside the US/ Canada but it is in the family (Heptageniidae)