Hatch ID · #20–24
Trico
Tiny black/white mayfly
Color palette
Color palette
Black thorax
White abdomen
Clear wing
Wing pattern
Wing profile
Tiny clear wings; spinners lie spent in the film.
When it hatches
J
F
M
A
M
J
J
A
S
O
N
D
Best time: Early morning spinner fall
Fly patterns
Trico Spinner, Griffith's Gnat
Hatches on