Watercolor portrait of Common Loon (Gavia immer)

Common Loon

Gavia immer
Migratory Clear, freshwater lakes with rocky shore… Common Resident Wail

Learn to identify the Common Loon by ear. Master the "haunting wail" phrase and tell it apart from similar species.

“ooo-AH-oooo”

What the Common Loon sounds like

Common Loons are large, powerful waterbirds with thick necks and dagger-like bills. In summer, adults have distinctive black and white checkered backs, a black head with a white necklace, and red eyes. In winter, they are gray above and white below with a partial white collar.

“haunting wail”

How to tell it apart

Listen for:A haunting, wavering call that rises and falls, often given at night or early morning on breeding lakes. Sounds like a wolf howl across water. Often written as “ooo-AH-oooo”.
Don't confuse with:The Pacific Loon — smaller size with slimmer bill

Lessons featuring the Common Loon

Ready to test your ear? Practice identifying the Common Loon's sounds in this interactive in-app lesson.

Waterline Radio lesson habitat
Waterline Radio
Tier 8 · Edges & Echoes
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Where you'll hear it

Clear, freshwater lakes with rocky shorelines in northern forests for breeding; coastal ocean waters, large lakes, and reservoirs during winter.

Most active during daylight hours, with distinctive calling often heard at night during breeding season.

Similar species

Pacific Loon

Smaller size with slimmer bill

Red-throated Loon

Smaller and slimmer with upturned bill

Double-crested Cormorant

Entirely black plumage

Common Loon sound FAQ

What does a Common Loon sound like?
A haunting, wavering call that rises and falls, often given at night or early morning on breeding lakes. Sounds like a wolf howl across water. Listen for the "haunting wail" phrase.
How do I tell a Common Loon from a Pacific Loon by sound?
Pacific Loon: Smaller size with slimmer bill; Breeding adults have gray head and hindneck rather than greenish-black; Throat patch is purple-black rather than greenish.
When is the best time to hear a Common Loon?
Most active during daylight hours, with distinctive calling often heard at night during breeding season.