摘要 : Contrary to its name, the Common Swift Apus apus is a rather scarce passage migrant in the eastern Arabian peninsula, mainly occurring from late February to early May and to a lesser extent in autumn, mainly September and October ... 展开 Contrary to its name, the Common Swift Apus apus is a rather scarce passage migrant in the eastern Arabian peninsula, mainly occurring from late February to early May and to a lesser extent in autumn, mainly September and October (Pedersen & Aspinall 2010, Eriksen & Victor 2013). Its tendency to pass through the region in low numbers, usually rapidly and at high altitude, means this species is presumably regularly overlooked, and, being frequently poorly observed, often dismissed as the much commoner Pallid Swift A. pallidus which is a breeding winter visitor to the eastern Arabian peninsula, being present and often conspicuous (including in urban centres in the UAE) from late October until May (Pedersen & Aspinall 2010, Jennings 2010). 收起