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.
Pilgrims may also be the most efficient foragers of all goose breeds; and the geese (females) are considered among the best as mothers among all the common goose breeds. (If you do work with a breed with poor mothering instincts, you can set your goose eggs under a broody hen, duck, Muscovy, or even turkey.)