Other Common Names: Great gray spotted sedge
Scientific Name: genus Arctopsyche
This cousin of the green rock worm, or green caddis , is an important spring hatch on some western rivers, where the large size of the adult brings some of the biggest fish in the river to the surface.
Hatches begin in mid to late May, often starting after the end of the March brown hatch. Due to its timing, the hatch is sometimes referred to as the "Mother's Day Caddis," but that name is more proper for grannoms . Where it occurs, this hatch is a much-anticipated spring event. Adults are usually found on the water beginning at midday.
LARVA COLOR: Green
PUPA SIZE: 10-16 mm
PUPA COLOR: Green body, tan shroud
ADULT SIZE: 11-14 mm
ADULT COLOR: Wings--Brown. Body--green, showing a bit of blue or teal near the top.
OTHER CHARACTERISTICS: Free-living larva; big cousin of the green rock worm. Body, wing, and shroud colors can vary, so it's always best to check a natural insect where you are fishing. Body and wing colors will darken when the insect is ready to lay eggs.
More About McKenzie Caddis
Click on the fly name to see the pattern. Click on the presentation to learn how to do it.
|indicator, tight line||riffles, just below riffles|
green body, tan shroud
|indicator, tight line, shallow nymph||riffles, just below riffles|
|Adult||Elk Hair Caddis||8-10
|standard dry fly||bankwater near foilage, below riffles|