{"id":98489,"date":"2014-09-24T12:31:29","date_gmt":"2014-09-24T10:31:29","guid":{"rendered":"http:\/\/focusingonwildlife.com\/news\/?p=98489"},"modified":"2024-04-16T09:39:28","modified_gmt":"2024-04-16T07:39:28","slug":"southern-migrant-hawker","status":"publish","type":"post","link":"https:\/\/focusingonwildlife.com\/news\/southern-migrant-hawker\/","title":{"rendered":"Southern Migrant Hawker"},"content":{"rendered":"

Aeshna affinis – Aeschne affine –<\/p>\n

Petite \u00e6schne, sa longueur est de 57 \u00e0 66 mm.<\/p>\n

De r\u00e9partition plut\u00f4t m\u00e9ridionale, cette libellule de plaine est en expansion vers le nord de l’Europe.Rarement abondante sur un site quoique, au Parc du Confluent Garonne-Ari\u00e8ge en Haute Garonne, ses effectifs soient particuli\u00e8rement importants depuis 2 ans. Elle fr\u00e9quente les eaux stagnantes qui s’ass\u00e8chent, particuli\u00e8rement \u00e0 proximit\u00e9 des rivi\u00e8res, et se contente facilement de grandes mares boueuses qui servent de bauges aux sangliers. Cette \u00e6schne se distingue des autres par cette couleur bleue g\u00e9n\u00e9ralis\u00e9e et les taches noires du 2\u00e8 segment (S2) de l’abdomen en forme de ‘masque’. Le thorax des m\u00e2les est jaune clair, plus ou moins lav\u00e9 de bleu, celui des femelles est jaune-vert. Southern Migrant Hawker<\/p>\n

It is rarely in high numbers on a site although, where the rivers Garonne and Ari\u00e8ge meet in Haute-Garonne, its breeding population has been on the increase particularly in the last 2 years. It is found around stagnant waters and large muddy puddles used by the wild boars to wallow.<\/p>\n

This \u00e6schna is easily recognizable from others by its general blue color. The thorax of males is light yellow with faded blue, that of females is more yellowish green.<\/p>\n

Les femelles sont g\u00e9n\u00e9ralement vertes mais certaines sont bleues. Le couple peut voler longtemps avant de d\u00e9cider d’un site propice pour pondre et ce vol est g\u00e9n\u00e9ralement erratique et ind\u00e9cis; il semblerait que la femelle choisisse le lieu en refusant de se poser si l’endroit ne lui convient pas.<\/p>\n

The females are usually greenish but some are blue. The pair can fly erratically for a while before electing a spot: it seems that female chooses it by refusing to land if it’s not adequat.<\/p>\n

Quand le tandem prend le risque de se poser, il est aussit\u00f4t attaqu\u00e9 par les m\u00e2les du coin qui cherchent \u00e0 les s\u00e9parer pour transf\u00e9rer leurs propres \u0153ufs dans la spermath\u00e8que de la femelle, poche dans laquelle la femelle stock les \u0153ufs pr\u00e9alablement d\u00e9pos\u00e9s par d’autres m\u00e2les. Elle peut alors pondre \u00e0 son gr\u00e9 tout en tentant d’\u00e9chapper aux m\u00e2les trop empress\u00e9s. Une fois que l’un d’eux en a saisi une, il vide ce r\u00e9servoir avec ses organes g\u00e9nitaux avant le transfert de son spermatophore, sac contenant ses propres spermatozo\u00efdes.<\/p>\n

When the tandem risks to perch, it is immediately attacked by other males trying to steal the female in order to transfer their own eggs in her spermatheca, the sac in which the female stocks the eggs she previously received from other males; it allows her to lay them when she sees fit. Once a male has seized one, he empties this sac with his genitalia before transferring his spermatophore, sac containing his own sperm cells.<\/p>\n

Cette ponte se fait de pr\u00e9f\u00e9rence \u00e0 l’ombre et dans la boue durcie mais humide proche de l’eau ou dans la mousse. Les \u0153ufs ainsi pondus sont invisibles dans le sol et \u00e0 l’abri des pr\u00e9dateurs qui vivent sous l’eau comme certains insectes carnivores ou les batraciens. Les larves \u00e9closent apr\u00e8s plusieurs jours et se dirigent alors vers l’eau o\u00f9 elles sont mieux \u00e0 m\u00eame de se d\u00e9fendre. Apr\u00e8s plusieurs mues successives sur une p\u00e9riode de 2 ans, elles sortent de l’eau pour se m\u00e9tamorphoser.<\/p>\n

Egg-laying occurs preferably in the shade into humid lumps of mud or moss close to the water, providing effective camouflage from the predators living in the water such as carnivorous insects and batracians. The larvae hatch after a few days and creep to the water thus enabled to defend themselves. After several moults over a 2 years period they come out and emerge from the exuvia.<\/p>\n

Ces deux-l\u00e0 se sont pos\u00e9s derri\u00e8re quelques herbes qui leur faisaient de l’ombre et tr\u00e8s d\u00e9licatement sans mouvements brusques, je suis parvenue \u00e0 les d\u00e9gager:<\/p>\n

Those 2 landed in the shade of a few blades of grass that I had to remove very slowly and with great care:<\/p>\n

\"\"<\/a>
Aeshna affinis – FEMELLE BLEUE \/ BLUE FEMALE<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

Aeshna affinis – Aeschne affine – Petite \u00e6schne, sa longueur est de 57 \u00e0 66 mm. De r\u00e9partition plut\u00f4t m\u00e9ridionale, cette libellule de plaine est en expansion vers le nord de l’Europe.Rarement abondante sur un site quoique, au Parc du Confluent Garonne-Ari\u00e8ge en Haute Garonne, ses effectifs soient particuli\u00e8rement importants depuis 2 ans. Elle fr\u00e9quente […]<\/p>\n","protected":false},"author":287,"featured_media":2195830,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/3.bp.blogspot.com\/-1BOUa7KEHnA\/VBaTNw6V8uI\/AAAAAAAArQA\/cQLGPvWqHZs\/s1600\/LIB-AeshnaAffinis-D5200H-7644_030914.jpg","fifu_image_alt":"Southern Migrant Hawker","footnotes":""},"categories":[6984,5],"tags":[6869,2407,2571,6870],"class_list":["post-98489","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs","category-wildlife","tag-aeshna-affinis","tag-france","tag-noushka","tag-souther-migrant-hawker"],"_links":{"self":[{"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/posts\/98489","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/users\/287"}],"replies":[{"embeddable":true,"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/comments?post=98489"}],"version-history":[{"count":0,"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/posts\/98489\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/media\/2195830"}],"wp:attachment":[{"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/media?parent=98489"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/categories?post=98489"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/focusingonwildlife.com\/news\/wp-json\/wp\/v2\/tags?post=98489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}