Callibaetis pictus (Baetidae), female imago, Laveroni Park, Groveland, Tuolumne County, California - 27 March 2014. Roger Rohrbeck was kind enough to confirm the ID.
Yes, a mayfly in Sept. Callibaetis female, I believe. Same as in www.flickr.com/photos/anitagould/2787654562/.
Una especie inesperada, no creí que estuviera esta especie en estas fechas y con este frío.
An unexpected species, I did not think I was this species at this time and in this cold
Location: Makunda Christian Hospital, Karimganj District, Assam
Date: 23rd October 2013
Equipment: Nikon D300s with Micro-Nikkor 105mm
Probably baetis. Very small, size 24 or 26. A few spinners in the air.
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...