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Article
Keith J. Bensusan, Auteur ; Bryan Shorrocks, Auteur ; Keith C. Hamer, AuteurExplanations for the coexistence of migratory and sedentary (resident) birds are much debated: some authors have suggested that migrants make use of surplus resources not exploited by residents, whereas others have recorded ecological shifts in [...]
Article
Ernest F. J. Garcia, Auteur ; Keith J. Bensusan, AuteurA small but significant northward movement of raptors occurs across the Strait of Gibraltar in June and July, following the main spring passage. Six key species-Honey-buzzard Pernis apivorus, Black Kite Milvus migrans, Egyptian Vulture Neophron [...]
Article
Keith J. Bensusan, Auteur ; Ernest F. J. Garcia, Auteur ; John E. Cortes, AuteurRaptor migration has been monitored regularly at Gibraltar since the mid-1960s. Long-term trends in abundance of spring migration were investigated for the ten most frequent species, five of which changed significantly in abundance during the st[...]
