Hatch ID · #18–22
Blue Winged Olive (Baetis)
Small olive-gray mayfly, upright gray wings
Color palette
Color palette
Olive body
Dun gray wing
Tan legs
Wing pattern
Wing profile
Small smoky-gray upright wings; 2 tails.
When it hatches
J
F
M
A
M
J
J
A
S
O
N
D
Best time: Midday, overcast days
Fly patterns
Parachute BWO, Pheasant Tail, RS2
Hatches on
Thermalito OutletUpper Sacramento RiverAmerican RiverStanislaus RiverTrinity RiverNew Melones LakeLake TullochDon Pedro ReservoirLake McClureLake McSwainModesto ReservoirWoodward ReservoirTurlock LakeCamanche ReservoirPardee ReservoirNew Hogan LakeLake AmadorFolsom LakeLake NatomaRollins LakeCollins LakeNew Bullards BarEnglebright LakeLake OrovilleLake BerryessaLake SolanoLos Vaqueros ReservoirLake Del ValleSan Pablo ReservoirLake ChabotAnderson LakeCoyote LakeSan Luis ReservoirO'Neill ForebayMillerton LakeBass LakePinecrest LakeLake AlpineSpicer Meadow ReservoirSilver LakeCaples LakeJenkinson Lake (Sly Park)Union Valley ReservoirLoon LakeLake TahoeDonner LakeStampede ReservoirBoca ReservoirProsser Creek Reservoir