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Les oiseaux de l'archipel de Nosy Hara, au nord nord-ouest de Madagascar et la nouvelle distribution connue du Gobe mouche de Ward (Pseudobias wardi)
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Author: Marie Jeanne Raherilalao.
Online ISSN: 1662-2510
Languages: French and English
No. of Pages: 7
Dimensions: 210mm x 297mm x 1mm

Item Identification Code (UID#): 1726
Shelving Location: Papers & Articles: Natural History: Ornithology
Estimated Value: £0.50
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Les oiseaux de l'archipel de Nosy Hara, au nord nord-ouest de Madagascar et la nouvelle distribution connue du Gobe mouche de Ward (Pseudobias wardi)

[Birds of the Nosy Hara Archipelago, north-northwest of Madagascar and the new distribution of Ward's Flycatcher (Pseudobias wardi)]
Madagascar Conservation & Development, vol 5, no 1: pp. 48-54.
Madagascar Wildlife Conservation (2010).
Stapled Printout

Abstract (French)

Peu d’informations ornithologiques étaient disponibles sur l’archipel de Nosy Hara, au nord nord-ouest de Madagascar. Afin de constituer une base de données scientifique, nous avons entrepris un inventaire du peuplement aviaire de cet archipel entre fin septembre et début octobre 2005. Pour la collecte des données, deux méthodes complémentaires ont été utilisées sur l’île de Nosy Hara, à savoir le taux de rencontre et les observations générales mais la présence des espèces dans certains îlots de l’archipel a été notée par la deuxième de ces techniques. Un total de 31 espèces d’oiseaux a été rencontré au cours de cet inventaire. Outre les espèces inféodées au milieu marin et celles des zones littorales, 18 espèces terrestres ont été trouvées sur l’île et une sur l’île d’Andalatsara. Bien que l’archipel présente un appauvrissement en espèces d’oiseaux par rapport aux autres écosystèmes forestiers de la grande terre, son importance ornithologique n’est pas à négliger. Le Gobe mouche de Ward Pseudobias wardi a été découvert au cours de cet inventaire dans un type d’habitat duquel il n’était pas encore connu et dans une nouvelle localité qui étend sensiblement sa distribution connue. La préservation de cet archipel est justifiée pour préserver ses richesses biologiques face aux diverses pressions anthropiques.

Abstract (English)

The Nosy Hara archipelago, located in the north north-western tip of Madagascar is made up of about 12 small islands surrounded by coral reef. Limestone formations of the Eocene called ‘Tsingy’ are their main substrate on which develops a narrow surface of western dry forest. With its aesthetic landscape, economic and socio-cultural and its natural resources, this archipelago forms the jewel of this part of the island. However, scientific information on biodiversity and ecology, especially on the birds of this archipelago were not available. To fill this gap, an inventory of birds was conducted between late September and early October 2005. For data collection, two complementary methods were used on the island of Nosy Hara, namely timed transects and general observations. However, the presence of species in some islands of the archipelago has been noted by the second technique. A total of 31 bird species was encountered during the inventory. Apart the marine and coastal bird species, 18 terrestrial species were found on the Nosy Hara and one on Andalatsara island. Seven species are endemics of which two are aquatics and five terrestrials. These results show that bird diversity of the inventory area is relatively poor showing the classic features of island fauna. However, a new type of habitat in a new locality for Pseudobias wardi was discovered during the inventory which extends the known distribution to date of this species in the western dry forests of Madagascar. Moreover, the beaches of some surrounding islands are an ideal place for nesting of some species of Sterna spp. Similarly, the cliffs provide nesting, hunting or resting sites for some birds of prey such as Haliaeetus vociferoides which is a critically endangered species. The preservation of this archipelago is then biologically essential face to various anthropogenic pressures.

Keywords (French)

Oiseaux; Pseudobias wardi; distribution; archipel de Nosy Hara; Madagascar.

Keywords (English)

Bird community; Pseudobias wardi; distribution; Nosy Hara archipelago.

Condition of Item

Very good.

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