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LES CANARDS D'ORNEMENT Spécial

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Écrit par samedi, 18 mai 2013 19:31;
Publié dans Poussinette;

Jeux de lumière sur l’eau, bruit enchanteur d’une cascade, et observation des animaux : installer un bassin dans son jardin offre de nombreux plaisirs et enrichit son écosystème.

Que ce soit à travers sa faune (poissons, batraciens et canards d’ornement) ou sa flore, votre jardin va se transformer, formant un biotope qui ravira petits et grands.

Cet espace aquatique induit un sentiment de bien-être, et la présence de canards d’ornement ne manquera pas d’y ajouter un climat d’observation relaxante. Si vous désirez créer un environnement aquatique naturel, privilégiez l’utilisation d’une bâche autour de laquelle votre pelouse, des pierres et une variété de plantations créeront un espace visuel du plus bel effet.

Les canards d’ornement, contrairement aux idées reçues, n’endommagent pas les gazons ; ils se contentent de ramasser ici et là des limaces ou autres petits insectes. Les petites espèces ne requièrent que peu de place à condition, bien sûr, de n’en détenir qu’un petit nombre d’individus. Vous pourrez les laisser se promener dans votre jardin à condition que les canards soient éjointés.

Ils resteront à l’extérieur toute l’année. Quelques buissons leur permettront de se protéger de la chaleur ou du mauvais temps.

La nature a pris des dispositions spéciales pour permettre aux oiseaux aquatiques de se mouvoir facilement dans l’eau, leur élément naturel. Leur corps contient un certain nombre de « vides », ce qui réduit leur poids par rapport à leur volume ; certains os renferment de l’air à la place de la moelle ; ces réservoirs d’air ont un effet pneumatique dont les oiseaux profitent.

Leur tronc a une forme caractéristique ; aplati et pourvu d’une large surface portante qui rappelle la coque d’un bateau. L’os de la poitrine est allongé loin vers l’arrière et les côtes sont longues ; leurs pieds sont palmés, ce qui les rend capables de se déplacer rapidement sur l’eau.

Leur large bec aplati est garni sur les côtés de lamelles cornées faisant fonction de passoire, qui leur permettent de recueillir leur nourriture dans l’eau. L’eau et la vase passent à travers, mais les infusoires (= êtres unicellulaires vivant dans les eaux stagnantes), plantes, coquillages et les vers restent dans le bec.

La couche de graisse sur la poitrine et le ventre constitue une protection contre un trop grand refroidissement du corps. À l’extrémité du dos, quelques centimètres avant l’attache des plumes caudales du milieu (dessus de la queue), se trouve une glande reconnaissable à un léger renflement, et garnie d’une courte touffe de plumes.

Cette glande est d’une importance essentielle pour les oiseaux aquatiques, car elle sécrète une substance grasse servant à rendre leur plumage imperméable : ils enduisent quotidiennement tout leur corps de cette « huile » qu’ils répartissent avec leur bec sur toutes leurs plumes. Un séjour prolongé de l’oiseau en dehors de son élément naturel ou l’absence d’eau pour se baigner stoppent le fonctionnement de la glande uropygienne ; le plumage de l’oiseau perdra alors son imperméabilité.

Un oiseau aquatique d’ornement est très propre, au point que, après avoir été manipulé par l’homme, il ira toujours se baigner dès qu’il aura retrouvé la liberté, pour son costume soit de nouveau pur de toute souillure.

Les oiseaux aquatiques d’ornement doivent toujours être élevés par couple, comme c’est la coutume chez le canard sauvage, l’oie grise et la bernache. Leur famille compte une quantité d’oiseaux nageurs (au total 225 espèces), parmi lesquels les cygnes, les oies et les nombreuses sortes de canards.

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