Complex sentence: The caribou in North America is not domesticated or herded as is the case of reindeer (the same species), reindeer are often found in colder regions in Europe, but is important as a quarry animal to the Inuit.
Split into simpler sentences: The caribou in North America is not domesticated or herded as is the case of reindeer (the same species). Reindeer are often found in colder regions in Europe, but is important as a quarry animal to the Inuit.