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Slate-Winged Brown Quills

Like most common names, "Slate-Winged Brown Quill" can refer to more than one taxon. For more detail click through to the scientific names.

Mayfly Species Baetis brunneicolor

These are very rarely called Slate-Winged Brown Quills.
This is the largest common species of Baetis on our trout streams, and it can hatch in incredible numbers, drawing impressive rises of selective trout.

Anglers may have read in books about Baetis hiemalis, which is now a synonym (Synonym: A former name of a taxon, usually a species. Entomologists frequently discover that two insects originally described as different species are one in the same, and they drop one of the names. The dropped name is said to be a synonym of the remaining name. These changes take a while to trickle into the common knowledge of anglers; for example, Baetis vagans is now a synonym of Baetis tricaudatus.) of Baetis brunneicolor. It appears to have been a name for the fall-hatching brood of this species, which was reported to prefer slow water and weedy habitat instead of the gravelly riffles of the early summer brood.

Mayfly Species Baetis intercalaris

These are very rarely called Slate-Winged Brown Quills.
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