{"id":14555,"date":"2023-06-08T22:49:48","date_gmt":"2023-06-08T20:49:48","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?page_id=14555"},"modified":"2025-05-15T12:02:27","modified_gmt":"2025-05-15T10:02:27","slug":"coenagrion-ornatum","status":"publish","type":"page","link":"https:\/\/www.meslibellules.fr\/blog\/coenagrion-ornatum\/","title":{"rendered":"Coenagrion ornatum (Selys, 1850)"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-male-1-.webp\"><img decoding=\"async\" width=\"2109\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-male-1-.webp\" alt=\"Coenagrion ornatum m\u00e2le, Druy-Parigny (France-58), 04\/06\/2023\" class=\"wp-image-14556 lazyload\" style=\"--smush-placeholder-width: 2109px; --smush-placeholder-aspect-ratio: 2109\/1204;width:662px;height:377px\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-male-1-.webp 2109w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-male-1--768x438.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-male-1--1536x877.webp 1536w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-male-1--2048x1169.webp 2048w\" data-sizes=\"(max-width: 2109px) 100vw, 2109px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Coenagrion ornatum m\u00e2le, Druy-Parigny (France-58), 04\/06\/2023<\/figcaption><\/figure>\n\n\n\n<h5><span style=\"text-decoration: underline;\">Description &#8211; identification<\/span><\/h5>\n\n\n\n<p>Coenagrion ornatum, l&rsquo;Agrion orn\u00e9, est \u00e0 distance copie-conforme de <a href=\"http:\/\/www.meslibellules.fr\/pagesweb\/coenagrionidae\/coenagrion\/mercuriale\/coenagrion-mercuriale-male-3\/coenagrion-mercuriale-male-12big.jpg\">Coenagrion mercuriale<\/a> qu&rsquo;il remplace dans l&rsquo;est de l&rsquo;Europe. Et il est effectivement difficile \u00e0 diff\u00e9rencier de son cousin sur le terrain. <br><br><strong>Le m\u00e2le<\/strong> mesure environ 30 mm, il est un peu plus sombre que C. mercuriale et porte comme lui sur le 2\u00b0 segment abdominal, un dessin combinant un pied et deux branches, dessin assez ind\u00e9finissable, en chauve-souris, en papillon, en verre \u00e0 pied (\u00e0 fond pointu&#8230;) ou en <a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-S2.webp\">As de pique dot\u00e9 de bras<\/a> attach\u00e9s ou non. Les segments S3 et S4 (voire S5) portent des motifs noirs tr\u00e8s effil\u00e9s vers l&rsquo;avant, plus \u00e9lanc\u00e9s que ce ceux de son cousin.<br>De pr\u00e8s, les diff\u00e9rences sont assez nombreuses\u00a0:<br> &#8211; les <a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-male-8.webp\">taches postoculaires<\/a> sont (normalement) fortement indent\u00e9es en arri\u00e8re (celles de C. mercuriale sont plus petites et arrondies)<br> &#8211; le <a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-male-2.webp\">pronotum<\/a> qui porte 2 larges taches lat\u00e9rales est trilob\u00e9, avec un petit lobe post\u00e9rieur \u00e0 marge enti\u00e8rement color\u00e9e<br> &#8211; les motifs sont tr\u00e8s effil\u00e9s sur S3 et S4 <br> &#8211; les <a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-male-5.webp\">appendices anaux discrets<\/a>, les sup\u00e9rieures tr\u00e8s courts, les inf\u00e9rieurs clairs, alors que ceux de C. mercuriale, tr\u00e8s visibles, sont sombres et de longueurs \u00e9gales.<br><br><strong>Les femelles<\/strong> sont bleues (Paul-Andr\u00e9 Robert cite cependant des femelles vertes) et se diff\u00e9rencient des rares <a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-mercuriale-accouplement-bleue-.webp\">C. mercuriale bleues<\/a> par leurs imposantes taches postoculaires spectaculairement indent\u00e9es post\u00e9rieurement. Le pronotum est \u00e9galement bien diff\u00e9rent, largement \u00e9chancr\u00e9 en arri\u00e8re pour laisser un petit lobe post\u00e9rieur \u00e0 marge bleue l\u00e9g\u00e8rement encoch\u00e9 en son centre.<br>Elles sont par contre vraiment proches des femelles de C. pulchellum qui peuvent montrer des taches postoculaires indent\u00e9es, un pronotum moins \u00e9chancr\u00e9 avec un lobe central plus massif et non indent\u00e9. Les femelles Coenagrion ornatum pr\u00e9sentent des motifs abdominaux tr\u00e8s effil\u00e9s et pointus.<br>Certaines femelles peuvent \u00eatre sombres, presque sans bleu \u00e0 la base des segments, mais toujours avec des taches postoculaires typiques.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-femelle-1-.webp\"><img decoding=\"async\" width=\"2504\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-femelle-1-.webp\" alt=\"Coenagrion ornatum femelle, Druy-Parigny (France-58), 04\/06\/2023\" class=\"wp-image-14558 lazyload\" style=\"--smush-placeholder-width: 2504px; --smush-placeholder-aspect-ratio: 2504\/1204;width:634px;height:304px\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-femelle-1-.webp 2504w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-femelle-1--768x369.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-femelle-1--1536x739.webp 1536w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Coenagrion-ornatum-femelle-1--2048x985.webp 2048w\" data-sizes=\"(max-width: 2504px) 100vw, 2504px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Coenagrion ornatum femelle, Druy-Parigny (France-58), 04\/06\/2023<\/figcaption><\/figure>\n\n\n\n<h5><span style=\"text-decoration: underline;\">Habitat et distribution g\u00e9ographique<\/span><\/h5>\n\n\n\n<p>Il ne se pla\u00eet que sur les ruisseaux ou ruisselets, \u00e9ventuellement p\u00e2tur\u00e9s, les foss\u00e9s, les suintements, tr\u00e8s ensoleill\u00e9s, les eaux tr\u00e8s peu profondes et \u00e0 faible d\u00e9bit. Il aime ces courants d&rsquo;eau p\u00e9rennes dans des espaces ouverts, mais non loin des haies bocag\u00e8res, avec une v\u00e9g\u00e9tation vari\u00e9e qui peut comporter, comme ici, de la Menthe et des Iris des marais. En ses choix, il partage l&rsquo;habitat de  C. mercuriale, souvent en bien plus grand nombre sur ces sites.<br>Il est rare sur toute son aire de distribution et en France, il est quasi limit\u00e9 \u00e0 la Bourgogne, surtout la Ni\u00e8vre, le sud de l&rsquo;Yonne, l&rsquo;ouest de la C\u00f4te-d&rsquo;Or, et, du nord au sud, la grande moiti\u00e9 ouest de la Sa\u00f4ne-et-Loire. Il a disparu d&rsquo;Alsace.<br>Vers l&rsquo;est de l&rsquo;Europe, il \u00ab\u00a0remplace\u00a0\u00bb C. mercuriale et s&rsquo;\u00e9tend du nord de l&rsquo;Italie \u00e0 la Pologne vers le sud-est jusqu&rsquo;\u00e0 l&rsquo;Iran \u00e0 travers la Turquie.<br><br><a href=\"https:\/\/atlas-odonates.insectes.org\/odonates-de-france\/coenagrion-ornatum\">Atlas Dynamique des Odonates de France<\/a><br><a href=\"https:\/\/www.iucnredlist.org\/species\/165520\/19158182#geographic-range\">IUCN Red List<\/a><\/p>\n\n\n\n<h5><span style=\"text-decoration: underline;\">P\u00e9riode de vol<\/span><\/h5>\n\n\n\n<p>En France, le pic des observations est en juin, avec des donn\u00e9es avant la mi-mai et jusqu&rsquo;au milieu de juillet. Il est donc rare et la dur\u00e9e de vie des imagos est courte !<\/p>\n\n\n\n<h5><span style=\"text-decoration: underline;\">Comportement &#8211; \u00c9cologie<\/span><\/h5>\n\n\n\n<p>Il est rare, donc peu observ\u00e9 et sa biologie reste largement inconnue.<br>Dans les Libellules de France, Belgique et Luxembourg, Daniel Grand  et Jean-Pierre Boudot pensent que les \u0153ufs peuvent passer l&rsquo;\u00e9t\u00e9 dans la vase des ruisselets dess\u00e9ch\u00e9s et n&rsquo;\u00e9clore qu&rsquo;\u00e0 l&rsquo;automne. <br>Pour ce que j&rsquo;en ai vu, je dirais que son comportement est tout \u00e0 fait similaire \u00e0 celui de C. mercuriale, ou m\u00eame de C. puella, alternance de longues errances dans la v\u00e9g\u00e9tation \u00e0 la recherche de femelles, o\u00f9 on les voit parfois \u00ab\u00a0picorer\u00a0\u00bb la v\u00e9g\u00e9tation pour y capturer de minuscules proies. <\/p>\n\n\n\n<h5><span style=\"text-decoration: underline;\">\u00c9tymologie<\/span><\/h5>\n\n\n\n<p>Coenagrion est form\u00e9 des 2 mots grecs Koinos \u2013<em>&nbsp;commun<\/em>&nbsp;et Agrios \u2013&nbsp;<em>vivant dans les champs, sauvage<\/em>. Ce nom de genre a \u00e9t\u00e9 form\u00e9 de fa\u00e7on complexe lorsqu\u2019il a fallu rediviser les familles existantes, de nouvelles esp\u00e8ces \u00e9tant d\u00e9couvertes, le terme \u00ab&nbsp;agrion&nbsp;\u00bb s\u2019av\u00e9rant insuffisant.<br>Ornatum, du latin &#8211;<em>ornatus<\/em> qui signifie &#8211;<em>orn\u00e9, d\u00e9cor\u00e9<\/em> et s&rsquo;applique \u00e0 l&rsquo;\u00e9l\u00e9gance des motifs effil\u00e9s de son abdomen.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.meslibellules.fr\/blog\/2023\/06\/19\/coenagrion-ornatum-males\/\">M\u00e2les<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.meslibellules.fr\/blog\/2023\/07\/05\/coenagrion-ornatum-femelle-emergente\/\">Femelle \u00e9mergente<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.meslibellules.fr\/blog\/2023\/07\/02\/coenagrion-ornatum-femelle\/\">Femelles<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.meslibellules.fr\/blog\/2023\/07\/08\/coenagrion-ornatum-tandem\/\">Tandem et accouplement<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:90px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-small-font-size\"><em>Je tiens \u00e0 remercier la SHNA-Ofab, Soci\u00e9t\u00e9 d&rsquo;Histoire Naturelle d<\/em>&lsquo;<em>Autun et l&rsquo;observatoire de la faune de Bourgogne, en particulier Etienne Hubert, gr\u00e2ce \u00e0 qui j&rsquo;ai pu d\u00e9couvrir cette esp\u00e8ce.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Description &#8211; identification Coenagrion ornatum, l&rsquo;Agrion orn\u00e9, est \u00e0 distance copie-conforme de Coenagrion mercuriale qu&rsquo;il remplace dans l&rsquo;est de l&rsquo;Europe. Et il est effectivement difficile \u00e0 diff\u00e9rencier de son cousin sur le terrain. Le m\u00e2le mesure environ 30 mm, il est un peu plus sombre que C. mercuriale et porte comme lui sur le 2\u00b0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","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 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