On such days, these are the nymph patterns that I like to have in my ... It imitates almost every subsurface insect – from mayfly nymphs to caddis pupa to stoneflies. When you’re not sure ...

During the nymph stage, they feed on algae and small plants; as adult mayflies, they do not have functioning mouths and cannot eat. This means an adult mayfly insect survives in adulthood for only ...

Scientists scooped sand from a riverbed in Thailand and found two nymphs of rare mayfly species not seen in 22 years, a study said. Photo from Kwanboon and Boonsoong (2025) Knee-deep in a river of ...