The Blue-winged Olive is a small mayfly with olive-green body and slate-blue wings that is one of the most important hatch species for fly-fishing throughout the trout season. It is typically a multi-brooded species with emergences in spring and fall. Massive spinner falls of dying adults on the water surface create intense feeding activity among trout and other fish.
Not certain it is a Blue-winged Olive? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Blue-winged Olive sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
Spot a Blue-winged Olive? Identify it instantly.
Point Huck at any plant, bird, or animal for an instant ID, its rarity, and a live map of where it is being seen near you.
Get HuckGet an alert when a Blue-winged Olive is spotted
Pick a park, state, or city and we’ll email you when one turns up there. One check a day, only when there’s something new.
Free. Unsubscribe from any email. See our Privacy Policy.
Love insects & arthropods? Get Huck field notes
Spotting tips, new species, and the best of what people are finding in the wild - straight to your inbox.