{"id":29391,"date":"2026-05-27T10:57:38","date_gmt":"2026-05-27T08:57:38","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=29391"},"modified":"2026-05-27T10:57:48","modified_gmt":"2026-05-27T08:57:48","slug":"oxygastra-curtisii-male-emergent","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2026\/05\/27\/oxygastra-curtisii-male-emergent\/","title":{"rendered":"Oxygastra curtisii m\u00e2le \u00e9mergent"},"content":{"rendered":"\n
\n
\"Biotope<\/a><\/figure>\n\n\n\n
\"Oxygastra<\/a><\/figure>\n
Oxygastra curtisii m\u00e2le \u00e9mergent, V\u00e8re-Gr\u00e9sign\u00e9 (F-81), 23\/05\/2026 et son biotope<\/figcaption><\/figure>\n\n\n\n

Je n'ai pas imm\u00e9diatement reconnu sous cet angle un Oxygastra curtisii m\u00e2le \u00e9mergent. Pour l'apercevoir, il fallait se pencher au-dessus de l'eau, juste \u00e0 droite de la trou\u00e9e dans la v\u00e9g\u00e9tation de la berge. Il \u00e9tait post\u00e9 20 cm au-dessus de l'eau sur un rameau d'un arbuste mort de la berge, qui, coud\u00e9, ressortait de l'eau \u00e0 30 cm de la rive. \u00c0 cet endroit, l'eau est encore plus immobile qu'ailleurs en raison des d\u00e9chets v\u00e9g\u00e9taux accumul\u00e9s par le vent.
Je suis pass\u00e9, puis repass\u00e9 devant cette sc\u00e8ne sans noter d'\u00e9volution.
J'ai donc tent\u00e9 de me saisir de la branchette sans faire tomber son r\u00e9sident.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Le transfert s'est pass\u00e9 sans incident et j'ai d'abord enfonc\u00e9 le rameau au soleil, essayant de rendre service<\/em> \u00e0 cet odonate (mais il fait tout de m\u00eame plus de 30 \u00b0C). Lors du mouvement qui l'a tout de m\u00eame secou\u00e9 un peu, il a r\u00e9ajust\u00e9 sa position sur la branche \u00e0 plusieurs reprises.
Bien s\u00fbr, d\u00e8s la premi\u00e8re photo, l'identification est ais\u00e9e en raison des traits jaunes de la face dorsale de l'abdomen. Il est couvert de d\u00e9bris v\u00e9g\u00e9taux, et on remarque bien s\u00fbr l'absence de son exuvie et sa coloration tr\u00e8s affirm\u00e9e, m\u00eame si ses yeux ont cette \u00e9tonnante couleur mauve des immatures.<\/p>\n\n\n\n

<\/div>\n\n\n\n
\"Oxygastra<\/a><\/figure>
\n

Aussi, je pense que m\u00eame s'il n'a jamais vol\u00e9, il n'a pas \u00e9merg\u00e9<\/em> sur cette branchette ; j'imagine plut\u00f4t qu'un facteur ext\u00e9rieur quelconque l'a fait tomber dans l'eau alors qu'il \u00e9tait sans doute encore incapable de voler et qu'il a d\u00fb nager, se couvrant de d\u00e9bris divers, jusqu'\u00e0 ce rameau.<\/p>\n\n\n\n


Malheureusement les ailes encore jointes se sont coll\u00e9es avec l'eau qui s'est infiltr\u00e9e entre elles. J'ai r\u00e9ussi \u00e0 d\u00e9coller les ailes droites des ailes gauches, mais les paires restantes m'ont sembl\u00e9 impossibles \u00e0 s\u00e9parer sans les d\u00e9chirer.
Je suis repass\u00e9 une heure plus tard faire une derni\u00e8re photo, il n'avait pas \u00e9volu\u00e9 ; je l'ai mis \u00e0 l'abri dans l'ombre claire de la v\u00e9g\u00e9tation\u2026<\/p>\n<\/div><\/div>\n\n\n\n

<\/div>\n\n\n\n

Le fait de trouver un Oxygastra curtisii en fin d'\u00e9mergence vers 14 heures, comme c'est le cas ici, \u00e9tait de toute fa\u00e7on un tr\u00e8s mauvais signe ; les \u00e9mergences se produisent exclusivement la nuit et l'envol avant l'aube (Maingeot et al., 2015).
L'\u00e9tang de cette base de loisirs est un lieu bien fr\u00e9quent\u00e9 par les odonatologues du Tarn ; ce n'est pourtant apparemment que la quatri\u00e8me fois que Oxygastra curtisii y est enregistr\u00e9.<\/p>\n\n\n\n

\"Oxygastra<\/a>
Oxygastra curtisii m\u00e2le \u00e9mergent, V\u00e8re-Gr\u00e9sign\u00e9 (F-81), 23\/05\/2026<\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

Maingeot, Motte & Goffard, 2015<\/strong> - Premi\u00e8re \u00e9tude de l'\u00e9mergence de la Cordulie \u00e0 corps fin (Oxygastra curtisii) le long de l'Ourthe<\/a> - Les Naturalistes Belges, volume 96, 3-4.<\/p>\n\n\n\n

<\/div>\n\n\n\n
\n
Accueil Oxygastra curtisii<\/a><\/div>\n\n\n\n
Accueil Odonates de France<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Je n'ai pas imm\u00e9diatement reconnu sous cet angle un Oxygastra curtisii m\u00e2le \u00e9mergent. Pour l'apercevoir, il fallait se pencher au-dessus de l'eau, juste \u00e0 droite de la trou\u00e9e dans la v\u00e9g\u00e9tation de la berge. Il \u00e9tait post\u00e9 20 cm au-dessus de l'eau sur un rameau d'un arbuste mort de la berge, qui, coud\u00e9, ressortait de […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[109,55,590],"tags":[399],"class_list":["post-29391","post","type-post","status-publish","format-image","hentry","category-corduliidae-france","category-france","category-oxygastra-curtisii","tag-corduliidae-france","post_format-post-format-image"],"yoast_head":"\nOxygastra curtisii m\u00e2le \u00e9mergent - 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