La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Olivaceous warblers in southeast Morocco
Auteurs :	Volker Salewski, Auteur ; Herbert Stark, Auteur ; Bernd Leisler, Auteur
Type de document :	Article
Dans :	British Birds (102(3) MAR 2009)
Article en page(s) :	116-121
Mots-clés :	Maroc
Résumé :	Both Western Olivaceous Warbler Hippolais opaca and Eastern Olivaceous Warbler H. pallida, of the form reiseri, occur in Morocco. The distribution of Western Olivaceous Warbler in the northern parts of the country is well known. Eastern Olivaceous Warbler has been recorded from the southeastern parts of Morocco, but its status, range limits and the degree of sympatry with Western Olivaceous Warbler are still not fully understood. A semi-quantitative survey of both species was carried out in the Erfoud/Merzouga area of southeast Morocco in May 2007 using visual observations and tape recordings. Both species were observed regularly in tamarisk Tamarix trees at various sites, often occurring together. Eastern Olivaceous Warblers were often singing intensively in this habitat. Western Olivaceous Warblers, however, did not show signs of territoriality or breeding activity here, except in a densely vegetated oasis. Our results suggest that Eastern Olivaceous Warbler may be a common breeding species in at least some sites in this area, whereas Western Olivaceous Warbler is mainly a passage migrant, breeding farther north but also in some densely vegetated parts of southeast Morocco.

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