Mallard duck and bird magnetic navigation in migration

  • 8
    Shares


– Anatidae – Camargue, Rhône delta, – the duck is at the origin of many other domestic ducks species. In captivity it lives 6 times longer than the wild ones and has been domesticated before the chicken. Taking birds in flight is a real exercise and fun to practice with wild non hybridized birds.

Ois-Colvert-D5200A-7742_140413

Anas platyrhynchos

Ois-Colvert_D5200A-7744_140413

Anas platyrhynchos

Bird magnetic navigation in their migrations: From the Daily Mail, 27th of april 2013

Scientists claim they have discovered how birds find their way across thousands of miles of land guided by the earth’s magnetic field. It is all about sensory hairs in the ears, 2000 times thinner than a human hair which cells contain a single iron ball acting much like a magnet. More details [HERE…]

Ois-Colvert-D5200A-8453_140413

Anas platyrhynchos

Ois-Colvert-D5200A-9223_140413

Anas platyrhynchos

Ois-Colvert-D5200A-8443_140413

Anas platyrhynchos

Ois-Colvert-D5200A-8386_140413

Anas platyrhynchos

Ois-Colvert-D5200A-9469_140413

Anas platyrhynchos

La navigation magnétique des oiseaux lors de leur migrations: Article paru dans le Daily Mail du 27 avril 2013

Des scientifiques australiens et autrichiens affirment avoir découvert comment les oiseaux trouvent leur chemin au cours de migrations de plusieurs milliers de kilomètres au dessus des terres, guidés par le champs magnétique de la Terre. Sous les plumes de leurs oreilles,ils sont équipés d’un système de navigation interne: des cellules de pileuses responsables de la détection du bruit et la gravité. Chaque cellule est équipée d’une bille de fer 2000 fois plus petite que l’épaisseur d’un cheveu:

Dailymail.co.uk

Diagramme d’une cellule pileuse qui détecte le son et la gravité;

Les billes de fer se trouvant directement sous les poils joueraient un rôle dans la détection magnétique.

Diagram: A hair cell which detects sound and gravity. Balls of iron are found directly beneath the hairs and may play a role in magnetic detection

Le fer, réagissant comme un compas – appelé magnétorécepteur, aiderait les oiseaux à savoir s’ils naviguent vers le nord ou vers le sud, leur position par rapport au soleil et visionner la géographie pour trouver ou retrouver leur chemin. On savait déjà que ces cellules pileuses impliquent l’équilibre et l’audition chez la plupart des animaux. Mattias Lawers, de l’Institut de Pathologie Moléculaire dit: “C’est passionnant, on trouve ces billes de fer chez tous les oiseaux quels qu’ils soient mais pas chez les humains ni chez aucun mammifère”.

Suivre le lien plus haut pour lire l’article en anglais.

Ois-Colvert-D5200A-9571_140413

Anas platyrhynchos

Noushka Wildlife

Noushka

Passionate about Wildlife, Photography and Wildlife issues. I live in the south of France at the present, but have lived in Africa for 16 years, in the U.S. for 3 years. With my husband, I created and managed a BIRD PARK in South Africa, raising mainly psittacines; the breeding facility housed over 1000 parrots at any given time. I speak French and English alike and manage decently in Spanish. My photography is about sharing fauna's beauty with other enthusiasts! Equipment: ALL NIKON Cameras: D500, D750 Tele lenses: 300 mm, 500 mm, 800 mm f5/6E, Zoom lenses: 16/80 mm, 80/400 mm, 200/500 mm and: Macro 150 Sigma. * * * My work can be seen HERE: http://1000-pattes.blogspot.fr/ * * * NOT ON FACEBOOK

Noushka Wildlife

Noushka Wildlife

Passionate about Wildlife, Photography and Wildlife issues. I live in the south of France at the present, but have lived in Africa for 16 years, in the U.S. for 3 years. With my husband, I created and managed a BIRD PARK in South Africa, raising mainly psittacines; the breeding facility housed over 1000 parrots at any given time. I speak French and English alike and manage decently in Spanish. My photography is about sharing fauna's beauty with other enthusiasts! Equipment: ALL NIKON Cameras: D500, D750 Tele lenses: 300 mm, 500 mm, 800 mm f5/6E, Zoom lenses: 16/80 mm, 80/400 mm, 200/500 mm and: Macro 150 Sigma. * * * My work can be seen HERE: http://1000-pattes.blogspot.fr/ * * * NOT ON FACEBOOK

Share this post with your friends

  • 8
    Shares


Facebook Comments

Leave a Reply

Please Login to comment
avatar