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Chalk-fronted corporal

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The chalk-fronted corporal (Ladona julia) is a skimmer dragonfly found in the northern United States and southern Canada.

Juveniles of both sexes are light reddish brown, with white shoulder stripes and a black stripe down the middle of the abdomen. As they mature, males develop a white pruinescence on the top of the thorax and at the base of the abdomen, while the rest of the abdomen turns black. Females become almost uniformly dark brown, with a dusting of gray pruinescence near the base of the abdomen; a few develop the same color pattern as the males.

Chalk-fronted corporals often perch horizontally on the ground or on floating objects in the water, flying up to take prey from the air. They are gregarious for dragonflies, and are commonly seen perching in groups. They readily approach humans to feed on the mosquitoes and biting flies that humans attract.

Gallery

References

  • Dunkle, S. W. (2000). Dragonflies through Binoculars. New York: Oxford University Press. p. 176. ISBN 0-19-511268-7.
  • Needham, J. G.; et al. (2000). Dragonflies of North America (rev. ed.). Gainesville, FL: Scientific Publishers. pp. 686–687. ISBN 0-945417-94-2.

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Chalk-fronted corporal: Brief Summary

provided by wikipedia EN

The chalk-fronted corporal (Ladona julia) is a skimmer dragonfly found in the northern United States and southern Canada.

Juveniles of both sexes are light reddish brown, with white shoulder stripes and a black stripe down the middle of the abdomen. As they mature, males develop a white pruinescence on the top of the thorax and at the base of the abdomen, while the rest of the abdomen turns black. Females become almost uniformly dark brown, with a dusting of gray pruinescence near the base of the abdomen; a few develop the same color pattern as the males.

Chalk-fronted corporals often perch horizontally on the ground or on floating objects in the water, flying up to take prey from the air. They are gregarious for dragonflies, and are commonly seen perching in groups. They readily approach humans to feed on the mosquitoes and biting flies that humans attract.

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Ladona julia ( French )

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La libellule julienne (Ladona julia) est une espèce d'odonates qui fait partie de la famille des Libellulidae. Elle est présente dans les États du nord des États-Unis et au sud de l'ensemble des provinces canadiennes à l'exception de Terre-Neuve-et-Labrador.

Synonymie
  • Libellula julia[1]

Description

L'adulte mesure entre 38 et 45 mm. Chez les deux sexes, on retrouve une tache sombre à la base des ailes antérieures et postérieures. Chez le mâle mature, le thorax est foncé avec une pruinescence blanche à l'extrémité de la face dorsale. L'abdomen est également foncé avec une pruinosité qui ne s'étend pas jusqu'au bout de celui-ci. La femelle mature a une coloration brun foncé et son abdomen est pruineux en sa base. Les immatures des deux sexes ont une coloration relativement brun rougeâtre uni, avec deux lignes pâles sur le prothorax et une ligne noire transversale sur l'abdomen[2].

Habitat

On retrouve Ladona julia dans les étangs, gravières, lacs, marais, marécages et ruisseaux[3].

Comportement

Ladona julia se perche généralement à l'horizontale, sur le sol ou sur des objets flottants. De plus, elle est une espèce grégaire et il est commun de l'observer en groupe de plusieurs individus[4].

Galerie

Références

  1. (en) James G. Needham, Minter J. Westfall, Jr. and Michael L. May, Dragonflies of North America, revised edition, Gainesville, FL 32608, Scientific Publishers, 4460 SW 35th Terrace, Suite 305, 2000, 939 p. p. (ISBN 0-945417-94-2)
  2. (en) Dennis Paulson, Dragonflies and Damselflies of the East, Princeton, New jersey, Princeton University Press, 2012, 544 p. p. (ISBN 978-0-691-12283-0, lire en ligne)
  3. Jean-Guy Pilon et Denise Lagacé, Les odonates du Québec, Chicoutimi (Québec), Entomofaune du Québec, 1998, 367 p. p. (ISBN 2-9802763-2-4)
  4. Chalk-fronted Corporal

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Ladona julia: Brief Summary ( French )

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La libellule julienne (Ladona julia) est une espèce d'odonates qui fait partie de la famille des Libellulidae. Elle est présente dans les États du nord des États-Unis et au sud de l'ensemble des provinces canadiennes à l'exception de Terre-Neuve-et-Labrador.

Synonymie Libellula julia
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Ladona julia ( Dutch; Flemish )

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Insecten

Ladona julia is een libellensoort uit de familie van de korenbouten (Libellulidae), onderorde echte libellen (Anisoptera).[1]

De wetenschappelijke naam Ladona julia is voor het eerst geldig gepubliceerd in 1857 door Uhler.

Bronnen, noten en/of referenties
Geplaatst op:
29-10-2011
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Ladona julia ( Polish )

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Ladona julia – gatunek ważki z rodzaju Ladona należącego do rodziny ważkowatych. Występuje na terenie Ameryki Północnej.

Przypisy

  1. Ladona julia, w: Integrated Taxonomic Information System (ang.).

Bibliografia

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Ladona julia: Brief Summary ( Polish )

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Ladona julia – gatunek ważki z rodzaju Ladona należącego do rodziny ważkowatych. Występuje na terenie Ameryki Północnej.

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Ladona julia ( Vietnamese )

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 src=
Bài viết này cần thêm chú thích nguồn gốc để kiểm chứng thông tin. Mời bạn giúp hoàn thiện bài viết này bằng cách bổ sung chú thích tới các nguồn đáng tin cậy. Các nội dung không có nguồn có thể bị nghi ngờ và xóa bỏ.
 src=
Male Chalk-fronted Corporals perching on a rock
 src=
Female juvenile
 src=
Female juvenile, side-view

Ladona julia là một loài chuồn chuồn ngô thuộc họ Libellulidae được tìm thấy ở miền bắc Bắc Mỹ và miền nam Canada.

Hình ảnh

Tham khảo

  • Dunkle, Sidney W. (2000). Dragonflies through Binoculars. New York: Oxford University Press. tr. 176. ISBN 0-19-511268-7.
  • Needham, James G.; Minter J. Westfall, Jr. and Michael L. tháng 5 (2000). Dragonflies of North America (rev. ed.). Gainesville, FL: Scientific Publishers. tr. 686–687. ISBN 0-945417-94-2. Chú thích sử dụng tham số |coauthors= bị phản đối (trợ giúp)

Liên kết ngoài

 src= Phương tiện liên quan tới Ladona julia tại Wikimedia Commons


Hình tượng sơ khai Bài viết về họ chuồn chuồn ngô Libellulidae này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.


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wikipedia VI

Ladona julia: Brief Summary ( Vietnamese )

provided by wikipedia VI
 src= Male Chalk-fronted Corporals perching on a rock  src= Female juvenile  src= Female juvenile, side-view

Ladona julia là một loài chuồn chuồn ngô thuộc họ Libellulidae được tìm thấy ở miền bắc Bắc Mỹ và miền nam Canada.

license
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original
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wikipedia VI