Physical 

Common loons reach lengths from 70-90 cm.  Dorsally, they are white with black spots.  The head and throat are black with a blue or green sheen.  Immature loons are often gray with a fluffy appearance.  They are known for their long haunting-like calls.

 

Habitat

G. immer are territorial in nature, and are often secluded from others of their species.  They winter on coastal bays and oceans on all coasts of North America.  They are very volatile to human distrubance and prefer quiet bodies of water especially during breeding season.

 

Feeding 

Common loons commonly eat shellfish, frogs, and aquatic insects.  They will swim through the water propelled by their feet.  they even eat while underwater with sharp cerations to hold onto slippery prey they may have caught.