Complex sentence: The Red-throated Loon or Red-throated Diver ("Gavia stellata") is a migratory aquatic bird found in the northern hemisphere; it breeds primarily in Arctic regions, and winters in northern coastal waters.
Split into simpler sentences: The Red-throated Loon or Red-throated Diver ("Gavia stellata") is a migratory aquatic bird found in the northern hemisphere. It breeds primarily in Arctic regions, and winters in northern coastal waters.