First record of Forbes-Watson's Swift Apus berliozi in southern Africa, with comments on vocal and visual identification

Abstract

We report the first record of Forbes-Watson's Swift Apus berliozi for the southern Africa region from coastal southern Mozambique. Identification was primarily based on vocal characters using sonogram analyses, which show that voice is diagnostic compared to all seven possible confusion species in the region. Current knowledge of the distribution and life history of A. berliozi is summarised, which shows that the Mozambique record extends the non-breeding range c.1,700 km south and suggests that Forbes-Watson's Swift is a migrant to the littoral of Tanzania and northern and central Mozambique. Field identification of Forbes-Watson's Swift using visual characters is challenging, but information is presented to aid separation from the most likely confusion species, Common Swift A. apus.