This was probably the smallest mayfly I have ever seen.
Small brown mottled body (Size 20 or so). Clear wings. Hind wings visible. 2 tails. Large orange eyes (Male specimen).
Tiny olive. Size 26-28]
Olive, size 22
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...