This site has been created by Bill Oehlke.
Comments, suggestions and/or additional information, especially sightings, are welcomed by Bill.
TAXONOMY:
Family: Sphingidae, Latreille, 1802 |
The Canadian Sphinx Moth, Sphinx canadensis (Wing span: 2 3/4 - 3 3/8 inches (7 - 8.5 cm)), flies from Newfoundland west to western Ontario and into Manitoba; south to New York, Kentucky, and Arkansas. Quebec is the specimen type locality.Dr. Richard Westwood, Associate Professor Center for Forest Interdisciplinary Research and Depts. of Biology and Environmental Studies, University of Winnipeg, reports they are moderately common near Winnipeg, Manitoba. Visit Sphinx canadensis, Bailey's Harbor, Door County, Wisconsins, July 16, 2001, courtesy of Janice Stiefel. I have never seen one on Prince Edward Island. Sphinx canadensis Peterborough, Ontario, June 13, 2005, courtesy of Tim Dyson. |
The upperside of the forewing is gray-brown or yellow-gray with black streaks along and between the veins and an interrupted white line along the outer margin. The upperside of the hindwing is black with white bands.
Sphinx canadensis, Peterborough, Ontario, June 30, 2005, courtesy of Tim Dyson.
Sphinx canadensis, Peterborough, Ontario, June 30, 2005, courtesy of Tim Dyson.
Sphinx canadensis, Medford, Taylor County, Wisconsin,
June 4, 2011, courtesy of Joan F. Rickert.
I feel it is Sphinx canadensis, based on the characters mentioned in the canadensis vs chersis comparison page, and the size comparison mentioned by Joan supports that determination.
Sphinx canadensis, Rimouski, Quebec,
courtesy of Jim Fortin.
Sphinx canadensis, Rimouski, Quebec,
courtesy of Jim Fortin.
Jim Fortin reports, "The flight period for eastern Quebec (Rimouski) starts near June 20 and continues until July 20 for sure, maybe later, but the latest I have hunted was in the third week of July. In eastern Quebec, I see most specimens in the first half of July."
Sphinx canadensis, Rimouski, Quebec,
June 25, 2014, courtesy of Derek Bridgehouse.
Jim Fortin reports, "I confirm from my observations that the species only accepts black ash (Fraxinus nigra)." Jim adds, "I tried them last summer (2015) on white ash ... all died and NEVER took a bite. And this year with black ash there was a superb survival rate!"
Sphinx canadensis eggs, Rimouski, Quebec,
courtesy of Jim Fortin.
Sphinx canadensis early instars, Rimouski, Quebec,
courtesy of Jim Fortin.
Sphinx canadensis third to fifth? instars, Rimouski, Quebec,
courtesy of Jim Fortin.
Sphinx canadensis fifth instar on black ash, Three Rivers SGA, St. Joseph County, Michigan,
courtesy of James P. Tuttle.
Sphinx canadensis fifth instar on black ash, Three Rivers SGA, St. Joseph County, Michigan,
September 1994, courtesy of James P. Tuttle.
Many thanks to Alexandre Laberge who provides the following series of images from Quebec. Alexandre is feeding them on Black ash (Fraxinus nigra) and reports they have moved from hatchlings to fourth instar larvae in as few as eight days. Incubation took only four days. Those larvae, which were offered white or red ash, did not survive.
To obtain eggs, Alexandre placed the captured female in a normal net cage with some Fraxinus branches in water.
Sphinx canadensis female, Quebec, August 5, 2018, courtesy of Alexandre Laberge.
Sphinx canadensis eggs, Quebec, August 5, 2018, courtesy of Alexandre Laberge.
Sphinx canadensis hatchlings, four day incubation period,
Quebec, August 8, 2018, courtesy of Alexandre Laberge.
Seven, well camouflaged, Sphinx canadensis hatchlings, on black ash,
Quebec, August 9, 2018, courtesy of Alexandre Laberge.
Sphinx canadensis second instar, on black ash,
Quebec, August 13, 2018, courtesy of Alexandre Laberge.
Sphinx canadensis second instars, on black ash,
Quebec, August 13, 2018, courtesy of Alexandre Laberge.
Sphinx canadensis second instars, on black ash,
Quebec, August 17, 2018, courtesy of Alexandre Laberge.
Sphinx canadensis third or fourth instar, on black ash,
Quebec, August 17, 2018, courtesy of Alexandre Laberge.
Sphinx canadensis fourth or fifth instar, on black ash,
Quebec, August 22, 2018, courtesy of Alexandre Laberge.
Sphinx canadensis sleeves on black ash,
Quebec, courtesy of Alexandre Laberge.
Alexandre sleeves his larvae as the host plant leaves do not retain or transport water very well when separated from the tree.
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