Watercolor portrait of Royal Tern (Thalasseus maximus)

Royal Tern

Thalasseus maximus
Year-round resident in the southeastern… Open saltwater along ocean coasts, bays,… Common Display vocal

Learn to identify the Royal Tern by ear. Master the "kree-ee-kree" phrase and tell it apart from similar species.

“kree-ee-kree”

What the Royal Tern sounds like

The Royal Tern is a large, elegant seabird instantly recognizable by its shaggy black crest and long orange bill. It patrols warm coastal waters, plunging head-first to snatch fish near the surface. Gregarious at all seasons, it breeds in dense colonies on isolated beaches and islands, often mixing with other tern species.

“kree-ee-kree”

How to tell it apart

Listen for:Rapid repeated ‘kree’ notes given by males during aerial courtship flights; not musical but slightly softer than regular calls. Often written as “kree-ee-kree”.
Don't confuse with:The Caspian Tern — caspian larger and bulkier with thicker blood-red bill and dark under primaries

Where you'll hear it

Open saltwater along ocean coasts, bays, estuaries, lagoons, sandy beaches, and offshore sandbars. Rarely ventures far inland.

Nests from late April to July on flat, sparsely vegetated beaches or shell banks; post-breeding dispersal begins midsummer, with winter flocks forming August–March.

Similar species

Caspian Tern

Caspian larger and bulkier with thicker blood-red bill and dark under primaries

Elegant Tern

Elegant slightly smaller with noticeably drooped bill tip

Sandwich Tern

Sandwich has slender black bill with yellow tip

Royal Tern song FAQ

What does a Royal Tern sound like?
Rapid repeated ‘kree’ notes given by males during aerial courtship flights; not musical but slightly softer than regular calls. Listen for the "kree-ee-kree" phrase.
How do I tell a Royal Tern from a Caspian Tern by sound?
Caspian Tern: Caspian larger and bulkier with thicker blood-red bill and dark under primaries; Caspian shows dark cap year-round, rarely shows large white forehead in winter.
When is the best time to hear a Royal Tern?
Nests from late April to July on flat, sparsely vegetated beaches or shell banks; post-breeding dispersal begins midsummer, with winter flocks forming August–March.