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.
Did you know that geese:- eat more than 1-5 pounds of grass per day-produce about 1-2 lbs of waste per day-average about 5 goslings per year-weigh 20 to 25 pounds-mate for life and will stay togetherthroughout the year-are federally protected by theMigratory Bird Treaty Act.