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Mayfly Species Leucrocuta hebe (Little Yellow Quill)

Pictures Below
This widespread species produces more fishable hatches in the East and Midwest than any other species in the Heptagenia genus complex.  

Where & When


Regions: East, Midwest

Time Of Year (?): Late May through October; best in early June

The best hatches are reported from the Upper Midwest.

Hatching Behavior


The duns emerge and fly away very quickly, making them usually pointless to imitate. Spinners are more likely to be relevant.

Pictures of 11 Mayfly Specimens in the Species Leucrocuta hebe:

Specimen Page:12
Female Leucrocuta hebe (Little Yellow Quill) Mayfly DunFemale Leucrocuta hebe (Little Yellow Quill) Mayfly Dun View 9 PicturesI found this dun on the same piece of stream as a similar spinner, probably of the same species.
Collected September 19, 2006 from Mystery Creek #43 in New York
Added to Troutnut.com by Troutnut on October 4, 2006
Leucrocuta hebe (Little Yellow Quill) Mayfly NymphLeucrocuta hebe (Little Yellow Quill) Mayfly Nymph View 3 PicturesThis is a very early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.).
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Specimen Page:12

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