Hostname: page-component-76fb5796d-qxdb6 Total loading time: 0 Render date: 2024-04-26T10:24:01.501Z Has data issue: false hasContentIssue false

Occurrence and habitat of the endangered white flower moth, Schinia bimatris (Lepidoptera: Noctuidae), in Manitoba

Published online by Cambridge University Press:  02 April 2012

A. Richard Westwood*
Affiliation:
Department of Biology, University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, Canada R3B 2E9
Christopher P. Friesen
Affiliation:
Manitoba Conservation Data Centre, Wildlife and Ecosystem Protection Branch, Manitoba Conservation, 200 Saulteaux Crescent, Winnipeg, Manitoba, Canada R3J 3W3
*
1Corresponding author (e-mail: r.westwood@uwinnipeg.ca).

Abstract

The only known Canadian population of the white flower moth, Schinia bimatris Harvey, a federally listed endangered species, was rediscovered in 2003 in the dune area of Spruce Woods Provincial Park and Canadian Forces Base Shilo in Manitoba. Little is known about the biology or habitat requirements of this moth in North America. The dune area in Manitoba was surveyed for adult and immature stages of the species during July 2007 using light traps and daytime visual searches. A detailed vegetation survey was also completed in areas where moths were active. Whereas individuals caught in light traps were predominantly males, both females and males were observed to be very active during daylight hours. This is the first record of diurnal activity of the white flower moth in Canada. Adults were observed flying above dune crests and also resting on vegetation between open dunes. Although the current population appears robust, given the number of adults observed, a previous population approximation of up to 5000 individuals may be an overestimate because sand-dune habitat is limited. We were unable to locate immature stages or determine which host plant(s) were utilized by larvae.

Résumé

La seule population canadienne connue de l’héliotin blanc satiné, Schinia bimatris Harvey, qui figure au répertoire des espèces menacées, a été redécouverte en 2003 dans la zone des dunes du parc provincial Spruce Woods et de la base des forces canadiennes à Shilo, Manitoba. On connaît peu sa biologie et ses besoins en habitat en Amérique du Nord. Nous avons inventorié la région des dunes au Manitoba à la recherche d’adultes et de stades immatures de l’héliotin en juillet 2007 à l’aide de pièges lumineux et par des recherches visuelles durant la journée. Nous avons aussi procédé à un inventaire détaillé de la végétation dans les régions d’activité des héliotins. Les pièges lumineux ont capturé surtout des mâles, alors que les mâles et les femelles peuvent être observés en forte activité durant les heures d’éclairement. Il s’agit de la première observation d’activité diurne de l’héliotin blanc satiné au Canada. Nous avons vu les adultes en vol au-dessus des crêtes des dunes et au repos sur la végétation entre les dunes découvertes. Bien que la population actuelle semble solide, compte tenu du nombre d’adultes observés, une évaluation approximative de la population de l’ordre de 5000 individus peut être une surestimation, car l’habitat des dunes de sable existant est restreint. Nous n’avons pas réussi à trouver les stades immatures, ni à déterminer la ou les plantes hôtes utilisées par les larves.

[Traduit par la Rédaction]

Type
Articles
Copyright
Copyright © Entomological Society of Canada 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Brou, V.A. 2003. Schinia bimatris (Harvey) in Louisiana. Southern Lepidopterists' News, 25: 7.Google Scholar
Budd, A.C., and Best, K.F. 1969. Wild plants of the Canadian Prairies. Publication 983–1969, Minister of Supply and Services Canada, Ottawa, Ontario.Google Scholar
Committee on the Status of Endangered Wildlife in Canada (COSEWIC). 2005. COSEWIC assessment and status report on the white flower moth Schinia bimatris in Canada. Committee on the Status of Endangered Wildlife in Canada, Ottawa, Ontario.Google Scholar
Dovetail Consulting. 1996. CFB Shilo environmental assessment and natural resources inventory (NRMP). Report to the Department of National Defence, Winnipeg, Manitoba.Google Scholar
Hardwick, D.F. 1996. A monograph of the North American Heliothentinae (Lepidoptera: Noctuidae). Published privately.Google Scholar
Looman, J., and Best, K.F. 1987. Budd's flora of the Canadian prairie provinces. Agriculture Canada Publication 1662, Minister of Supply and Services Canada, Hull, Quebec.Google Scholar
Swengel, A.B., and Swengel, S.R. 1999. Observations on Schinia indiana and Schinia ucens in the Midwestern United States (Lepidoptera: Noctuidae). Holarctic Lepidoptera, 6(1): 1121.Google Scholar
Vance, R.E., and Wolfe, S.A. 1996. Geological indicators of water resources in semi-arid environments: southwestern interior of Canada. In Geoindicators: assessing rapid environmental changes in earth systems. Edited by Berger, A.R. and Iams, W.J.. Balkema, A.A., Rotterdam, the Netherlands.Google Scholar
Vance, F.R., Jowsey, J.R., McLean, J.S., and Switzer, F.A. 1999. Wildflowers across the prairies. Greystone Books, Vancouver, British Columbia.Google Scholar
Westwood, R., and Friesen, C. 2007. Ottoe skipper (Hesperia ottoe) and white flower moth (Schinia bimatris) surveys on CFB Shilo and Spruce Woods Provincial Park, Manitoba. Final report to the Canadian Wildlife Service. University of Winnipeg, Winnipeg, Manitoba.Google Scholar
Young, M. 1996. The natural history of moths. T. and A.D. Poyser (Poyser Natural History), London, and Cambridge University Press, Cambridge, United Kingdom.Google Scholar