Loons eat mostly medium-sized fish (7 to 8 inches, or 18 to 20 centimeters). Young loons are fed worms, mollusks, and crustaceans such as freshwater shrimp and crayfish.
Loons peer into the water, often with their bills submerged, and dive. Most food is eaten underwater, as loons can remain below the surface for more than a minute. Though most food is caught close to the surface, they may dive as deep as 230 feet (70 meters) if the water is clear enough. Loons eat a lot; a pair can consume 2,000 pounds (910 kilograms) of fish in one breeding season.
- Loons: Gaviiformes - Behavior And Reproduction
- Loons: Gaviiformes - Physical Characteristics
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