{"id":20531,"date":"2024-07-31T21:05:13","date_gmt":"2024-07-31T19:05:13","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=20531"},"modified":"2024-08-01T08:11:42","modified_gmt":"2024-08-01T06:11:42","slug":"ischnura-fluviatilis","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2024\/07\/31\/ischnura-fluviatilis\/","title":{"rendered":"P\u00e9rou &#8211; Ischnura fluviatilis (Selys, 1876)"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-1.webp\"><img decoding=\"async\" width=\"2181\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-1.webp\" alt=\"Ischnura fluviatilis m\u00e2le, P\u00e9rou, Tahuayo lodge, 12\/08\/2023\" class=\"wp-image-20528 lazyload\" style=\"--smush-placeholder-width: 2181px; --smush-placeholder-aspect-ratio: 2181\/1204;width:714px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-1.webp 2181w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-1-768x424.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-1-1536x848.webp 1536w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-1-2048x1131.webp 2048w\" data-sizes=\"(max-width: 2181px) 100vw, 2181px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Ischnura fluviatilis m\u00e2le, P\u00e9rou, Tahuayo lodge, 12\/08\/2023<\/figcaption><\/figure>\n\n\n\n<p>Nous n&rsquo;avons rencontr\u00e9 Ischnura fluviatilis que sur un seul site, une seule fois, alors que je suis revenu \u00e0 plusieurs reprises pour essayer de faire de meilleures photos et de trouver une femelle. Seul, il se trouvait sur un petit ruisseau encaiss\u00e9, avec un d\u00e9bit assez fort, qui sort de la for\u00eat, \u00e0 une trentaine de m\u00e8tres du lodge et de la rivi\u00e8re Tahuayo, en compagnie de Hetaerina sanguinea et de nombreux Erythrodiplax attenuata. Je l&rsquo;avais d\u00e9j\u00e0 rencontr\u00e9 dans de meilleures circonstances, avec une femelle, <a href=\"https:\/\/www.meslibellules.fr\/voyages\/bresil\/ischnura-fluviatilis\/ischnura-fluviatilis.php\">au Br\u00e9sil<\/a>.<br>Il a \u00e9t\u00e9 d\u00e9crit par Selys dans son Synopsis des Agrionines (1), et cet auteur trouvait qu&rsquo;il ressemble \u00e0 notre <a href=\"https:\/\/www.meslibellules.fr\/images\/coenagrionidae\/ischnura\/pumilio\/pum_male1\/dos2_big.jpg\">Ischnura pumilio<\/a> europ\u00e9en. Pourtant, le S8 de I. fluviatilis est tout bleu, celui de notre I. pumilio bleu, seulement dans son tiers post\u00e9rieur, ce qui le rend plus proche de <a href=\"https:\/\/www.meslibellules.fr\/voyages\/bresil\/ischnura-capreolus\/ischnura-capreolus\/ischnura-capreolus-male-2big.jpg\">I. capreolus<\/a> sur ce point, mais Selys ne connaissait pas cette derni\u00e8re esp\u00e8ce&#8230;<br>En tout cas, le genre est toujours facile \u00e0 identifier avec ses taches postoculaires si caract\u00e9ristiques, petites et rondes..<br><br>On ne peut donc le confondre dans cette r\u00e9gion qu&rsquo;avec I. capreolus, qui s&rsquo;en s\u00e9pare par le d\u00e9tail d\u00e9j\u00e0 mentionn\u00e9 et par le fait que ses pt\u00e9rostigmas sont bicolores, ceux de I. capreolus \u00e9tant brun sombre ou gris\u00e2tres.<br>Il est aussi <em>plus grand<\/em> que le minuscule I. capreolus et mesure 30 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\/Ischnura-fluviatilis-male-2.webp\"><img decoding=\"async\" width=\"1920\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-2.webp\" alt=\"Ischnura fluviatilis m\u00e2le, P\u00e9rou, Tahuayo lodge, 12\/08\/2023\" class=\"wp-image-20529 lazyload\" style=\"--smush-placeholder-width: 1920px; --smush-placeholder-aspect-ratio: 1920\/1204;width:636px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-2.webp 1920w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-2-768x482.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-2-1536x963.webp 1536w\" data-sizes=\"(max-width: 1920px) 100vw, 1920px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Ischnura fluviatilis m\u00e2le, P\u00e9rou, Tahuayo lodge, 12\/08\/2023<\/figcaption><\/figure>\n\n\n\n<p>Il habite les marges bien v\u00e9g\u00e9talis\u00e9es des milieux humides, des lacs et des \u00e9tangs, mais aussi les rives des ruisseaux et rivi\u00e8res comme le sugg\u00e8re son nom d&rsquo;esp\u00e8ce.<br>De la m\u00eame fa\u00e7on que d&rsquo;autres esp\u00e8ces d&rsquo;Ischnura, il <em>nous semble parfois \u00e9nerv\u00e9<\/em>, et agite son abdomen de bas en haut \u00e0 plusieurs reprises, ce qui est sans doute un signal, un mode de communication d&rsquo;une information que nous ne pouvons qu&rsquo;imaginer. C&rsquo;est en tout cas un comportement fr\u00e9quemment rapport\u00e9 (ici sur un <a href=\"https:\/\/www.meslibellules.fr\/blog\/2021\/05\/03\/ischnura-pumilio-male-3-3\/\">Ischnura pumilio<\/a>) et qui appara\u00eet limit\u00e9 \u00e0 ce genre.<br><br>L&rsquo;esp\u00e8ce pr\u00e9sente une large distribution en Am\u00e9rique du Sud, du Venezuela \u00e0 la Guyane Fran\u00e7aise, jusqu&rsquo;au Chili et \u00e0 l&rsquo;Argentine.<br><a href=\"https:\/\/www.iucnredlist.org\/species\/159093\/5310488#geographic-range\">IUCN Red List<\/a>, qui ne doit pas \u00eatre vraiment \u00e0 jour.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-3.webp\"><img decoding=\"async\" width=\"577\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ischnura-fluviatilis-male-3.webp\" alt=\"Ischnura fluviatilis m\u00e2le, P\u00e9rou, Tahuayo lodge, 12\/08\/2023\" class=\"wp-image-20530 lazyload\" style=\"--smush-placeholder-width: 577px; --smush-placeholder-aspect-ratio: 577\/1204;width:242px;height:auto\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<div style=\"height:28px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>Ischnura (2) vient du grec\u00a0<em>ischnos<\/em>\u00a0pour<em>\u00a0fin<\/em>\u00a0ou\u00a0<em>mince<\/em>\u00a0et de\u00a0<em>oura<\/em>\u00a0qui signifie\u00a0<em>queue<\/em>. Charpentier explique qu\u2019il a cr\u00e9\u00e9 ce nom en raison de la finesse exceptionnelle de l\u2019abdomen (sans doute en comparaison du genre Calopteryx, d\u2019apr\u00e8s Fliedner (2006), car elle n\u2019a pour nous rien d\u2019\u00e9tonnant en soi).<br>Fluviatilis, du latin <em>fluviatilis<\/em>, &#8211;<em>relatif au fleuve<\/em>. Selys rapporte que certains exemplaires qu&rsquo;il d\u00e9tient on \u00e9t\u00e9 pris sur le haut Amazone aux bords de l&rsquo;Irura ; cependant je n&rsquo;ai pas r\u00e9ussi \u00e0 trouver de fleuve ou de rivi\u00e8re de ce nom. Seul un lieu nomm\u00e9 Iraru sur le rio Javari, \u00e0 la fronti\u00e8re du Br\u00e9sil et du P\u00e9rou, pourrait correspondre.<br><br>Ischnura fluviatilis m\u00e2le, P\u00e9rou, Tahuayo lodge, 12\/08\/2023<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<div style=\"height:31px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p style=\"font-size:13px\">1- Selys-Longchamps. 1876. <a href=\"https:\/\/archive.org\/details\/CUbiodiversity1124049-9775\/page\/268\/mode\/2up\">Synopsis des Agrionines (suite de la 5eme l\u00e9gion: Agrion). Le grand genre Agrion<\/a>.&nbsp;<em>Bulletins de l&rsquo;Acad\u00e9mie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique<\/em><br>2- The Naming of Australia\u2019s Dragonflies, Ian Endersby &amp; Heinrich Fliedner, Busybird publishing.<\/p>\n\n\n\n<div style=\"height:32px\" 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\/odonates-du-perou-peruvian-odonates\/\">Accueil P\u00e9rou<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Nous n&rsquo;avons rencontr\u00e9 Ischnura fluviatilis que sur un seul site, une seule fois, alors que je suis revenu \u00e0 plusieurs reprises pour essayer de faire de meilleures photos et de trouver une femelle. Seul, il se trouvait sur un petit ruisseau encaiss\u00e9, avec un d\u00e9bit assez fort, qui sort de la for\u00eat, \u00e0 une trentaine [&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":[1308,1303],"tags":[1309,1305],"class_list":["post-20531","post","type-post","status-publish","format-image","hentry","category-coenagrionidae-perou-2","category-perou","tag-coenagrionidae-perou","tag-perou","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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