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.
Snow leopards are carnivores and eat meat. Their preferred prey animals are the Asiatic ibex, which is a large type of wild goat, and the argali, which is a type of wild... Snow leopards are carnivores and eat meat. Their preferred prey animals are the Asiatic ibex, which is a large type of wild goat, and the argali, which is a type of wild sheep. Snow leopards have also been known to hunt small mammals, birds and domestic animals. They mainly hunt during the dawn and dusk hours.