Male Ephemerella excrucians (Pale Morning Dun) Mayfly Dun Pictures

Love the ventral photo. One guide ties duns with green abdomens and a bit of orange in the thorax. I see why now. Super photos.

It seems like most of the imitations I see in fly shops for PMDs, and dubbing mixes or other body materials designed to imitate PMDs, are a pale yellow color. I would just like to use this specimen to point out that in many cases (or in all the cases I've seen), most true PMDs (Ephemerella excrucians) are not yellow, but olive (with a bit of a gold tinge). I have some René Harrop PMD dubbing with the appropriate olive cast, but other than that I'm just seeing a lot of pale yellow more suited to eastern sulphur mayflies than excrucians.

The label PMD also applies to Ephemerella dorothea infrequens, but it seems they're also green as duns, unless I misidentified that specimen by associating an excrucians dun with nearby dorothea spinners.