**Mayfly Species Callibaetis californicus (Speckled Spinner)**

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Baetidae (Blue-Winged Olives)

» Genus Callibaetis (Speckled Spinners)

» Species californicus (Speckled Spinner)

Common Names

Match	Common Name
	Speckled Spinner
	Speckled Dun
	Grizzly Quill
	Speckled-Winged Spinner

This western species is the largest of the Baetidae family. It can be quite common in weedy and cold stillwaters, especially on the West Coast as it's name implies. Initial broods can be 12mm or larger making them easy to recognize. At the lower end of its size range however, it is quite difficult if not impossible for anglers to distinguish from its smaller and more common sibling, Callibaetis ferrugineus hageni. They are so similar in behavior and appearance that discerning the difference is not a factor in angling success. See the Callibaetis Hatch Page for pertinent information.

Your Thoughts On Callibaetis californicus:

You must log in at the top of the page to post. If you haven't registered yet, it's this easy:

Mayfly Species Callibaetis californicus (Speckled Spinner)

Your Thoughts On Callibaetis californicus:

Jargon Defined:

**Mayfly Species Callibaetis californicus (Speckled Spinner)**