Ah, yes, the Baetis. Otherwise known as the Blue-Winged Olive, it is a bug about which anglers need to know. That’s because BWOs hatch periodically in the spring, summer and fall (cf. the Orvis Eastern Hatch Chart).
When nymphing, I usually fish a size 18 or 20. One trick is to make them slim. The video below from Fly Fish Food does just that. It also features some important strike triggers: a touch of flash, segmentation and gills/legs.
It’s a great video. I think I’ll be tying these by the dozen to re-load the fly boxes.