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.
The diet of snowshoe hares is variable. They eat many different kinds of grasses, small leafy plants, and flowers. The new growth of trembling aspen, birches and willows is also eaten.During the winter, snowshoe hares forage on buds, twigs, bark, and evergreens.They have been known to scavenge the remains of their own kind in the winter months.hey eat many different kinds of grasses, small leafy plants, and flowers. The new growth of trembling aspen, birches and willows is also eaten. During the winter, snowshoe hares forage on buds, twigs, bark, and evergreens. They have been known to scavenge the remains of their own kind in the winter months.