Relatively large for this family. Found
from the Rocky Mountains to Pacific Northwest.
Emerges mid-June into September. 3/8ths". Mostly
lakes and ponds. Tolerant of polluted water.
Darkly speckled.
"Little Speckle Wing
Quill"
Callibaetis
coloradensis
small minnow
mayfly nymph
Relatively large for this family. Found
from the Rocky Mountains to Pacific Northwest.
Emerges mid-June into September. 3/8ths". Mostly
lakes and ponds. Tolerant of polluted water.
Darkly speckled.
Other small
minnow mayflies: Blue Winged Olive,
Tiny Lead Winged Red Quill