Fished in sizes 4 through 12, the tan/brown or coffee/brown versions are the most ... Larger sizes imitate stonefly nymphs; smaller sizes mimic green drake mayfly nymphs. Available with or without a ...

Photo from Kwanboon and Boonsoong (2025) Researchers found two nymphs of the “rare mayfly species” Behningia baei, the study said. Photos show these brown insects, which blend in with the ...

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 ...