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Mayfly Genus Siphlonurus (Gray Drakes)

Taxonomic Navigation -?-
» Genus Siphlonurus (Gray Drakes)
Species in SiphlonurusNumber of SpecimensNumber of Pictures
Siphlonurus alternatusGray Drake00
Siphlonurus autumnalisGray Drake00
Siphlonurus columbianusGray Drake00
Siphlonurus occidentalisGray Drake00
Siphlonurus phyllisGray Drake00
Siphlonurus quebecensisGray Drake00
Siphlonurus rapidusGray Drake00
Siphlonurus spectabilisGray Drake00

12 species aren't included.
Common Names
MatchCommon Name
****Gray Drakes
*Black Drakes


Pictures Below ↓

This is page 2 of specimens of Siphlonurus. Visit the main Siphlonurus page for:

  • The behavior and habitat of Siphlonurus.
  • 3 underwater pictures of Siphlonurus.

Pictures of 22 Mayfly Specimens in the Genus Siphlonurus:

Specimen Page:123
Siphlonurus occidentalis (Gray Drake) Mayfly SpinnerSiphlonurus occidentalis (Gray Drake) Mayfly Spinner View 4 Pictures
Collected July 31, 2007 from Crazy Beaver Spring in Montana
Added to Troutnut.com by Bnewell on June 28, 2011
Female Siphlonurus quebecensis (Gray Drake) Mayfly DunFemale Siphlonurus quebecensis (Gray Drake) Mayfly Dun View 3 PicturesThis one hatched in my house after I brought some nymphs home to photograph.
Collected May 18, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Siphlonurus phyllis (Gray Drake) Mayfly NymphSiphlonurus phyllis (Gray Drake) Mayfly Nymph View 3 PicturesThis specimen was the first record from Montana and the first record from the mountain west except Alberta where it was first described. It was found in temporary ponds.The nymph has double gills on all segments. The abdominal stripe is an important feature for identification
Collected July 2, 2007 from Temporary ponds- Glacier Nat. Park in Alaska
Added to Troutnut.com by Bnewell on June 26, 2011
Siphlonurus alternatus (Gray Drake) Mayfly NymphSiphlonurus alternatus (Gray Drake) Mayfly Nymph View 2 Pictures
Collected June 8, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006
Siphlonurus occidentalis (Gray Drake) Mayfly NymphSiphlonurus occidentalis (Gray Drake) Mayfly Nymph View 2 Pictures
Collected August 4, 2011 from Rainbow Lake in Washington
Added to Troutnut.com by Bnewell on August 4, 2011
Female Siphlonurus autumnalis (Gray Drake) Mayfly SpinnerFemale Siphlonurus autumnalis (Gray Drake) Mayfly Spinner View 8 PicturesI found this specimen and saw a few more of its kind during midday on a small, steep, rocky creek fairly high in the Cascades, different from the previously reported habitats of its species.
Collected September 29, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on November 10, 2020
Siphlonurus occidentalis (Gray Drake) Mayfly NymphSiphlonurus occidentalis (Gray Drake) Mayfly Nymph View 2 PicturesThis species emerges very late in the fall often along with Siphlonurus autumnalis just before ice forms on edges of streams.
Collected November 30, 2006 from Crazy Beaver Spring in Montana
Added to Troutnut.com by Bnewell on June 28, 2011
Siphlonurus phyllis (Gray Drake) Mayfly NymphSiphlonurus phyllis (Gray Drake) Mayfly Nymph View 1 Pictures
Collected June 9, 2007 from Wetlands in Glacier National Park in Montana
Added to Troutnut.com by Bnewell on June 28, 2011
Siphlonurus autumnalis (Gray Drake) Mayfly NymphSiphlonurus autumnalis (Gray Drake) Mayfly Nymph View 1 Pictures
Collected August 31, 2007 from Crazy Beaver Spring in Montana
Added to Troutnut.com by Bnewell on June 28, 2011
Female Siphlonurus alternatus (Gray Drake) Mayfly SpinnerFemale Siphlonurus alternatus (Gray Drake) Mayfly Spinner View 7 PicturesI'm tentatively classifying this one as Siphlonurus alternatus, because it seems to fit that species best in the old keys in Needham's Biology of Mayflies, but I'm hesitant because I can't find documentation that southwest Montana or the surrounding area is within the species' range, although they are widely distributed throughout eastern North American and western Canada.
Collected July 2, 2019 from the Gallatin River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019
Specimen Page:123
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