|An Emden goose, a breed derived from the Greylag goose (Anser anser). Domestic geese derived from the greylag goose have the trinomial name A. anser domesticus|
|A Chinese goose derived from the swan goose (Anser cygnoides). It has the trinomial name A. cygnoides domesticus|
A. a. domesticus & A. c. domesticus
|Anser anser domesticus & Anser cygnoides domesticus|
Humans have kept domesticated varieties of geese for their meat, eggs and down feathers since ancient times. Domestic geese have been derived through selective breeding from the wild greylag goose (Anser anser domesticus) and swan goose (Anser cygnoides domesticus).