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Fly Hatch Talk

> Callibaetis Spinner Habits

The sub-species Callibaetis ferrugineus ferrugineus and Callibaetis ferrugineus hageni taken together are by far the most important Callibaetis taxon in American trout waters. In extant angling literature, the sub-species ferrugineus ferrugineus inhabiting the east and Midwest is referred to as ferrugineus sans the sub-species name. In the West, Callibaetis ferrugineus hageni is referred to by many old and familiar synonyms (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.), such as americanus, nigritus, and coloradensis. While important in the East and Midwest, it is in the West where Callibaetis ferrugineus hageni has achieved legendary status. Many western stillwater anglers look to the hatches of these speckled duns and spinners as the highlight of their seasons and have coined the phrase "gulpers" to describe the trout's feeding activity. In the West, some spring fed lower elevation lakes with longer growing seasons can produce as many as three discrete broods. In typical baetid fashion, these broods will be larger and darker in the Spring tending smaller and lighter as the season progresses. Read more...

Female Callibaetis ferrugineus (Speckled Dun) Mayfly Dun (3 Pictures)

Callibaetis ferrugineus (Speckled Dun) Mayfly Adult (3 Pictures)