Complex sentence: It was the ecological equivalent of the heavy-footed moa in the subalpine zone and their remains have occasionally been found together, although the heavy-footed moa generally preferred warmer and dryer lowland areas.
Split into simpler sentences: It was the ecological equivalent of the Heavy-footed Moa in the subalpine zone. While their remains have occasionally been found together, the heavy-footed moa generally preferred warmer and dryer lowland areas.