Xen- (prefix): Foreign or other. As in: 1  Xenoantigen -- An antigen that is found in more than one species.  Xenograft -- A surgical graft of tissue from one species to an unlike species, genus or family.
Diet. Snow Geese feed almost exclusively on plant material. During the breeding season, they eat many seeds, leaves, and roots of aquatic vegetation. The very young birds feed on invertebrates. Berries become more important in the fall. In winter, waste grain from agricultural fields has become a primary food source.
It is thought that the Greylag goose is the ancestor of most domestic geese that we have in Europe today (the exception being African and Chinese geese that are thought to descend from the Wild Swan goose).e have a Keeping Geese FAQ section (below) which should answer most of your questions and a Beginners Guide To Keeping Geese in the general geese sub-category which provides a lot of useful information for you to get started.