I'm working on a world for my story and am having a difficult time determining features of an animal that my people would use on this planet.
The planet is earth like astronomically and in composition. but very windy and with land bridges around the world (magic). I don't have fixed speed decided, but it's common to go above earth's fastest recorded speed of 400kmh, sometimes gusting above greatest speed a human can survive, 800kmh.
The people are humans that have technologically/culturally adapted to the planet, but haven't been here long enough for biological adaptations. They are constantly moving around the planet. Their planet does not rotate about its sidereal frame, but still orbits its Earth-like sun. so they have adapted to live between the "day" and "night" side, constantly chasing the sun (to avoid 6 months of no sun). This means the terrain they are perpetually (from their POV) entering just finished 6 months of pure sun.
My question is what type of land-based migratory herd (now domesticated) pack animal would adapt to this environment and what adaptations they would need. These animals, unlike the humans, are native to the planet, so they have whatever biological adaptations they need to survive. They too are perpetually chasing the setting sun. To stay within this habitable twilight band, they must travel about 4.5 km/hr (no more or less, though they can pause for a few days to forage/hunt).
Unless you have ideas for plant-life that can survive 6 months of pure sun, I suspect these pack animals will have to be carnivorous, hunting other animals trying to stay within this band.
Please let me know if I can clarify anything to help you help me answer this.