The Egyptian Goose (Alopochen aegyptiacus) is a member of the duck, goose and swan family Anatidae. It is in the shelduck subfamily Tadorninae, and is the only extant member of the genus Alopochen. mtDNA cytochrome b sequence data suggest that the relationships of Alopochen to Tadorna need further investigation (Sraml et al. 1996).
Two or three species of Alopochen from the Madagascar region have become extinct in the last 1000 years or so:
Mauritian Shelduck, Alopochen mauritianus - Mauritius, late 1690s
Malagasy Shelduck or Madagascar Shelduck, Alopochen sirabensis (may be subspecies of A. mauritianus) - Madagascar, prehistoric: see Late Quaternary prehistoric birds
Réunion Shelduck or Kervazo's Egyptian Goose, Alopochen kervazoi - Réunion, c.1690s
This 63–73 cm long species breeds widely in Africa except in deserts and dense forests, and is locally abundant. They are found mostly in the Nile Valley and south of the Sahara. It has also been introduced elsewhere: Great Britain, the Netherlands and Germany have self-sustaining feral populations, the British population dating back to the 18th century, though only formally added to the British list in 1971. In Britain, it is found mainly in East Anglia, in parkland with lakes. It was officially declared a pest in the UK in 2009.
Balboa lake. Los Angeles. California.