Imperial County, California, US
Brown body, clear wings, large turbinate eyes (spinner, male). 2 tails, one broken off.
This was caught in a spider web. May have been there a few days, but it's not totally desiccated, so perhaps fairly fresh. Greyish-brown body, heavily speckled wings. About 8 mm.
Small, brown body, two long tails, large eyes (this is a male). Clear wings. Note the large pointed bump on the leading edge of hind wing.
Cloeon dipterum (Linnaeus, 1761), to Robinson trap, Søborg, Denmark, 20/21 June 2015
Baetidae is a family of mayflies with about 900 described species distributed worldwide. These are among the smallest of mayflies, adults rarely exceeding 10 mm in length excluding the two long slender tails and sometimes much smaller, and members of the family are often referred to as small mayflies or small minnow mayflies. Most species have long oval forewings with very few cross veins (see Comstock-Needham system) but the hindwings are usually very small or even...