All critters need a place to live, and Nature has places in mind for each of Us. They are called Biomes, special locales determined by heat, cold, wetness, dryness and seasonal considerations. No two places are really the same, obviously. Nor are these lacations constant; Nature likes to mix things up.
Rhinos are alert to shifts in any of these Biome qualities, and try to keep ahead of the pack when shifting home turf.
So far, so good.