Callibaetis (Gray Quill; Speckle-winged Dun; Speckled Dun; Speckle-winged Quill; Dark Specklewingd Quill; Speckle-winged Spinner. )	mature larva (nymph) - female Copyright © 2009 Catfish	subimago (dun) - male Copyright © 2009 Lynette Schimming subimago (dun) - female Copyright © 2010 Kevin Hall imago (spinner) - male Copyright © 2013 John Barry imago (spinner) - female Copyright © 2012 Lynette Schimming
Callibaetis	Small, recurved flap gills on abdominal segments 1-4 or 1-7; 3 fringed tails of equal length with interlocking hairs.	Minute hind wing with an obtuse costal angulation and numerous crossveins.
Callibaetis ferrugineus hageni (Little Speckle-winged Quill; Medium Speckle-winged Dun; Pale Speckle-winged Olive; Speckled Spinner; Speckle-winged Dun; Speckle-winged Spinner. )
	Heavy tracheation; body mottled medium brown w/dark markings; gills pale yellowish brown.	Body: dark olive/light cheamish tan Wings: dark gray brown w/white veination Length: 10-6 mm as season progresses. Tails: 2 Emergence: May-Oct.
Callibaetis fluctuans (Pale Speckle-winged Dun. )
	Body: mottled light brown w/ delicate median stripe; gills pale yellowish brown.	Body: dark olive/light cheamish tan Wings: dark gray brown w/white veination Length: 10-6 mm as season progresses. Tails: 2 Emergence: May-Oct.
Callibaetis pictus (Medium Speckle-winged Quill. )
	Body: pale brownish mottled w/brown; gills pale yellowish brown.	.

State of Washington distribution is based on:
Mayflies (Ephemeroptera) of the far western United States (Part I: Washington) by M. D. Meyer & W. P. McCafferty,
and augmented by A DNA Barcode Library for North American Ephemeroptera: etc. by Webb, Jacobus, Funk, et. al.