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.
Canada geese migrate to find food. In Canada, when the grass is frozen over, the geese fly elsewhere. They fly in a V shape so every geese can get to their destination safely. â¦ They don't use magnetism or the sun to get to the destination, they use landmarks learnt by their parents or flock.