The Red-throated Loon is the smallest of the five species of loon. After breeding in the high arctic, the Red-throated Loon spends the winter on the Atlantic and Pacific coasts of North America reaching as far south as Baja California and the northern Caribbean. During the winter and migration it can be found in large groups of 200-1200 individuals on inshore waters, along sheltered coasts, and occasionally inland on large lakes. The Red-throated Loon pursues its prey underwater. Its prey consists mostly of small fish, molluscs and crustaceans; individuals have been recorded on dives that last as long as 9 minutes, although the average dive lasts 1-2 minutes. Not currently threatened, Red-throated Loon populations suffer from the effects of heavy metal pollution, oil spills and fisheries bycatch.