{"id":30407,"date":"2026-08-14T12:00:12","date_gmt":"2026-08-14T10:00:12","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=30407"},"modified":"2026-08-14T12:07:35","modified_gmt":"2026-08-14T10:07:35","slug":"orthetrum-cancellatum-predation","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2026\/08\/14\/orthetrum-cancellatum-predation\/","title":{"rendered":"Un repas bien agr\u00e9able pour Orthetrum cancellatum - Pr\u00e9dation 2\/2"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-5.webp\"><img decoding=\"async\" width=\"1057\" height=\"1504\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-5.webp\" alt=\"Orthetrum cancellatum pr\u00e9dation sur une Chloromye agr\u00e9able, Villedieu-la-Blou\u00e8re (F-49), 17\/05\/23\" class=\"wp-image-30329 lazyload\" style=\"--smush-placeholder-width: 1057px; --smush-placeholder-aspect-ratio: 1057\/1504;aspect-ratio:0.7027959791960806;width:437px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-5.webp 1057w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-5-768x1093.webp 768w\" data-sizes=\"(max-width: 1057px) 100vw, 1057px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Orthetrum cancellatum pr\u00e9dation sur une Chloromye agr\u00e9able, Villedieu-la-Blou\u00e8re (F-49), 17\/05\/23<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"text-decoration: underline;\"><span style=\"font-size: 14pt;\">Orthetrum cancellatum pr\u00e9dation sur une Chloromye agr\u00e9able<\/span><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bien s\u00fbr, le titre de l'article est un jeu de mots que n'aurait pas appr\u00e9ci\u00e9 ce dipt\u00e8re ; cet <em>Orthetrum cancellatum<\/em> m\u00e2le fait en effet son repas d'une <em><a href=\"https:\/\/www.meslibellules.fr\/insectes\/diptere\/stratiomyidae\/chloromyia-formosabig.jpg\">Chloromye agr\u00e9able<\/a><\/em>  (<em>Chloromyia formosa<\/em>). C'est une petite mouche de 7 \u00e0 10 mm de la famille des stratiomyid\u00e9s. Elle se distingue par son corps au brillant \u00e9clat vert ou bleu m\u00e9tallique, visible dans les jardins de mai \u00e0 ao\u00fbt.<br>L'<em>Orthetrum r\u00e9ticul\u00e9<\/em>, quant \u00e0 lui, mesure environ 44 \u00e0 50 mm.<\/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\/Orthetrum-cancellatum-repas-6.webp\"><img decoding=\"async\" width=\"1524\" height=\"1504\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-6.webp\" alt=\"Orthetrum cancellatum d\u00e9vorant une Chloromye agr\u00e9able, Villedieu-la-Blou\u00e8re (F-49), 17\/05\/23\" class=\"wp-image-30330 lazyload\" style=\"--smush-placeholder-width: 1524px; --smush-placeholder-aspect-ratio: 1524\/1504;aspect-ratio:1.0133101348412352;width:467px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-6.webp 1524w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-6-768x758.webp 768w\" data-sizes=\"(max-width: 1524px) 100vw, 1524px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Orthetrum cancellatum d\u00e9vorant une Chloromye agr\u00e9able, Villedieu-la-Blou\u00e8re (F-49), 17\/05\/23<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Tous les odonates sont exclusivement carnivores et ce depuis leur \u00e9tat larvaire, lors de leur vie aquatique. <br>Adultes, ils sont capables de performances a\u00e9riennes \u00e9tonnantes pour capturer leur proie et leur vol \"pr\u00e9dictif\" a \u00e9t\u00e9 une source d'\u00e9tonnement lorsqu'il a \u00e9t\u00e9 d\u00e9couvert ; ils sont capables de poursuivre et d'anticiper le trajet de leur proie, ils ne se contentent pas de suivre et de rattraper, mais \"analysent\" le vol de la proie et leur propre position pour tenter d'anticiper la trajectoire de la proie.<br><br>Et l'article de <strong><em>Mischiati<\/em><\/strong> et al. (2015) est une petite r\u00e9volution.<br>Les chercheurs ont \u00e9quip\u00e9 des libellules de marqueurs r\u00e9tror\u00e9fl\u00e9chissants microscopiques et ont utilis\u00e9 des syst\u00e8mes de capture de mouvement haute vitesse. Ils ont enregistr\u00e9 la position exacte et l'orientation de la t\u00eate et du corps lors de vols d'interception, face \u00e0 des proies r\u00e9elles (<em>Drosophila<\/em>) et des proies artificielles contr\u00f4l\u00e9es par ordinateur \u00e0 vitesse constante.<\/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\/Orthetrum-cancellatum-repas-7.webp\"><img decoding=\"async\" width=\"2429\" height=\"1504\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-7.webp\" alt=\"Orthetrum cancellatum d\u00e9vorant une Chloromye agr\u00e9able, Villedieu-la-Blou\u00e8re (F-49), 17\/05\/23\" class=\"wp-image-30331 lazyload\" style=\"--smush-placeholder-width: 2429px; --smush-placeholder-aspect-ratio: 2429\/1504;aspect-ratio:1.615085967831392;width:591px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-7.webp 2429w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-7-768x476.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-7-1536x951.webp 1536w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Orthetrum-cancellatum-repas-7-2048x1268.webp 2048w\" data-sizes=\"(max-width: 2429px) 100vw, 2429px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Orthetrum cancellatum pr\u00e9dation sur une Chloromye agr\u00e9able, Villedieu-la-Blou\u00e8re (F-49), 17\/05\/23<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ils ont montr\u00e9, et c'est l\u00e0 la surprise, que <em>Platythemis lydia<\/em> n'utilise pas une simple \u00ab navigation parall\u00e8le \u00bb r\u00e9active, o\u00f9 elle corrige son cap au fur et \u00e0 mesure que l'image de la proie d\u00e9rive sur sa r\u00e9tine.<br>Mais ils d\u00e9montrent au contraire :<br>- qu'elle pr\u00e9dit la trajectoire et la vitesse de la proie.<br>- que son \"cerveau\" pr\u00e9dit les cons\u00e9quences visuelles de son propre d\u00e9placement.<br>- que le syst\u00e8me nerveux calcule exactement les ordres moteurs \u00e0 envoyer aux muscles de la t\u00eate pour compenser sa propre trajectoire et maintenir la proie au centre de son champ visuel (<em>fov\u00e9ation<\/em>).<br>- que la t\u00eate de la libellule pivote de mani\u00e8re pr\u00e9dictive pour verrouiller la proie avec un retard quasi nul. L'angle form\u00e9 entre la t\u00eate et le corps sert ensuite de guide pour orienter le corps et fermer la trajectoire d'interception.<br>- que la vision sert principalement \u00e0 ajuster la trajectoire en cas de man\u0153uvres impr\u00e9vues de la proie, mais le gros du guidage est assur\u00e9 par le pilotage pr\u00e9dictif<br>- que l'alignement pr\u00e9dictif de la t\u00eate permet \u00e0 la libellule de maintenir la proie dans son angle mort d'attaque, par le bas, et de positionner son corps pour que la proie tombe directement dans ses pattes. Cela explique en partie pourquoi les libellules affichent un taux de r\u00e9ussite \u00e0 la chasse sup\u00e9rieur \u00e0 90\u201395 %, l'un des plus \u00e9lev\u00e9s du r\u00e8gne animal.<br><br>Ils d\u00e9montrent ainsi qu'un syst\u00e8me nerveux d'\u00e0 peine un million de neurones offre des perspectives majeures pour la robotique autonome : cela prouve qu'un guidage pr\u00e9dictif ultra-rapide et de haute pr\u00e9cision ne n\u00e9cessite pas des calculateurs massifs, mais une architecture de circuits neuronaux particuli\u00e8rement optimis\u00e9e.<\/p>\n\n\n\n<div style=\"height:33px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:13px\"><strong>Mischiati, M., Lin, H.-T., Herold, P., Imler, E., Olberg, R. and Leonardo, A. (2015)<\/strong>. <a href=\"https:\/\/www.nature.com\/articles\/nature14045\">Internal models direct dragonfly interception steering<\/a>. Nature\u2008517, 333-338.<\/p>\n\n\n\n<div style=\"height:33px\" 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\/pagesweb\/libellulidae\/orthetrum\/cancellatum\/orthetrum-cancellatum-repas.php\">Retour<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:23px\" 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=\"http:\/\/www.meslibellules.fr\/pagesweb\/libellulidae\/orthetrum\/cancellatum\/orthetrum-cancellatum-accueil.php\">Accueil Orthetrum cancellatum<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Orthetrum cancellatum pr\u00e9dation sur une Chloromye agr\u00e9able Bien s\u00fbr, le titre de l'article est un jeu de mots que n'aurait pas appr\u00e9ci\u00e9 ce dipt\u00e8re ; cet Orthetrum cancellatum m\u00e2le fait en effet son repas d'une Chloromye agr\u00e9able (Chloromyia formosa). C'est une petite mouche de 7 \u00e0 10 mm de la famille des stratiomyid\u00e9s. Elle se [&hellip;]<\/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":[1290],"tags":[],"class_list":["post-30407","post","type-post","status-publish","format-image","hentry","category-non-classe-fr","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - 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