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Iron Blue Duns

Like most common names, "Iron Blue Dun" can refer to more than one taxon. They're previewed below, along with 6 specimens. For more detail click through to the scientific names.

Mayfly Species Paraleptophlebia adoptiva

These are very rarely called Iron Blue Duns.
This is the best Spring hatch after the Quill Gordons (Epeorus pleuralis) but before the Hendricksons (Ephemerella subvaria) in most parts of the East, although it can overlap with both. The Blue Quills are small mayflies (hook size 16-20) but they can hatch in incredible numbers at a time when eager trout are just beginning to look to the surface after a hungry winter.
Male Paraleptophlebia adoptiva (Blue Quill) Mayfly DunMale Paraleptophlebia adoptiva (Blue Quill) Mayfly Dun View 14 Pictures
Collected April 30, 2007 from in
Added to Troutnut.com by on May 3, 2007
Male Paraleptophlebia adoptiva (Blue Quill) Mayfly SpinnerMale Paraleptophlebia adoptiva (Blue Quill) Mayfly Spinner View 7 PicturesBased on the pale longitudinal forewing veins (excepting the costals), dark middle terga (Tergum: the dorsal part of an abdominal segment or segments (terga). Also used to describe the entire abdominal dorsum or the thoracic dorsal segments of Odonata.), and genitalia (Burks '53), this specimen is P. adoptiva.
Collected May 9, 2007 from in
Added to Troutnut.com by on May 18, 2007

Mayfly Species Leptophlebia cupida

These are very rarely called Iron Blue Duns.
Most anglers encounter these large mayflies every Spring in the East and Midwest. They are omnipresent in small portions, providing filler action in the days or hours between the prolific hatches of the early season Ephemerella flies.

See the main Leptophlebia page for details about their nymphs, hatching, and egg-laying behavior. This is by far the most important species of that genus.
Leptophlebia cupida (Black Quill) Mayfly NymphLeptophlebia cupida (Black Quill) Mayfly Nymph View 7 Pictures
Collected January 13, 2004 from in
Added to Troutnut.com by on January 25, 2006
Male Leptophlebia cupida (Black Quill) Mayfly DunMale Leptophlebia cupida (Black Quill) Mayfly Dun View 6 PicturesThis Leptophlebia cupida dun was extremely cooperative, and it molted into a spinner for me in front of the camera. Here I have a few dun pictures and one spinner picture, and I've put the entire molting sequence in an article.
Collected May 27, 2005 from in
Added to Troutnut.com by on May 16, 2006
Female Leptophlebia cupida (Black Quill) Mayfly SpinnerFemale Leptophlebia cupida (Black Quill) Mayfly Spinner View 7 Pictures
Collected May 28, 2005 from in
Added to Troutnut.com by on May 24, 2006

Mayfly Species Leptophlebia johnsoni

These are very rarely called Iron Blue Duns.

Mayfly Species Paraleptophlebia mollis

These are very rarely called Iron Blue Duns.
This species often emerges together with Paraleptophlebia strigula and Paraleptophlebia guttata, and the combined effect can be a good fishable hatch. The latter two are much less famous than mollis, but Knopp and Cormier say they are more reliable.
Male Paraleptophlebia mollis (Jenny Spinner) Mayfly DunMale Paraleptophlebia mollis (Jenny Spinner) Mayfly Dun View 6 Pictures
Collected June 8, 2005 from in
Added to Troutnut.com by on May 26, 2006
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