Although the visual identification of male hybrids between American Wigeon Mareca americana and Eurasian Wigeon Mareca penelope has been discussed in some detail (e.g. Harrop 1994, Gillham & Gillham 1996, 2002, Jiguet 1999, Votier et al. 2003, Reeber 2015), the vocalisations of these hybrids are poorly known. Carey (1993) noted that some vagrant male hybrids in East Asia, which closely resembled American Wigeon in appearance, gave calls similar to Eurasian; but, otherwise, vocalisation of hybrids has generally been overlooked. For example, of 7,077 observations of Eurasian x American Wigeon hybrids on eBird.org, 2,011 are supported with photographs but just six with audio.