Watercolor portrait of Black-crowned Night-Heron (Nycticorax nycticorax)

Black-crowned Night-Heron

Nycticorax nycticorax
Common Night-flight call

Learn to identify the Black-crowned Night-Heron by ear. Master the "kwok!" phrase and tell it apart from similar species.

“kwok!”

What the Black-crowned Night-Heron sounds like

A short, harsh kwok or quawk, often heard as birds fly between roosts and feeding areas around dusk or at night.

How to tell it apart

Listen for: “kwok!”
Don't confuse with the Yellow-crowned Night-Heron. Its harsh quawk is usually higher-pitched than the Black-crowned Night-Heron’s barklike call.

Where you'll hear it

Breeds across temperate and tropical regions worldwide and winters where water remains unfrozen, farther south or along coasts.

Marshes, lakes, ponds, tidal flats, mangroves, flooded rice fields, and even city park lakes—anywhere shallow water and cover for daytime roosting are available.

Migratory in cooler parts of North America, Europe, and Asia; resident or only locally dispersive in the tropics.

How to recognize it by sight

Stocky, medium-sized heron with a striking black crown and back contrasting with pale gray wings and white underparts. Primarily crepuscular and nocturnal, it spends days hunched on branches or reed edges and becomes active at dusk, flying with slow, purposeful wingbeats to feeding sites.

Similar species

Yellow-crowned Night-Heron

Yellow-crowned has thicker bill and yellowish crown stripe.

Green Heron

Much smaller and slimmer.

Black-crowned Night-Heron sound FAQ

What does a Black-crowned Night-Heron sound like?
A short, harsh kwok or quawk, often heard as birds fly between roosts and feeding areas around dusk or at night. Listen for the "kwok!" phrase.
How do I tell a Black-crowned Night-Heron from a Yellow-crowned Night-Heron by sound?
Yellow-crowned Night-Heron: Its harsh quawk is usually higher-pitched than the Black-crowned Night-Heron’s barklike call.
When is the best time to hear a Black-crowned Night-Heron?
Migratory in cooler parts of North America, Europe, and Asia; resident or only locally dispersive in the tropics.