Sooty Tern vs Bridled Tern

In short

The Sooty Tern and Bridled Tern are similar seabirds, but the Sooty Tern is more often seen far from land and in large flocks, while the Bridled Tern is more solitary and often near flotsam or land. Key differences include the Bridled Tern's more pronounced white supercilium and less extensive black cap.

Identification tips

• White Supercilium: Look for the Bridled Tern's pronounced white supercilium and forehead.
• Cap and Upperparts: Note the Sooty Tern's more extensive black cap and darker upperparts.
• Behavior: Observe flocking behavior; Sooty Terns are often in large groups, Bridled Terns are more solitary.
• Location: Consider proximity to land; Bridled Terns are more often near shore or flotsam.

Size

Both species are similar in size, typical of medium-sized terns.

Plumage

The Sooty Tern has a more extensive black cap and lacks the pronounced white supercilium seen in the Bridled Tern. The Bridled Tern's upperparts are slightly paler, and it has a more defined white forehead and supercilium.

Behaviour

Sooty Terns are often seen in large flocks and rarely near land, while Bridled Terns are more solitary, often associating with flotsam and more likely to be seen near shore.

Habitat

Sooty Terns are typically found far out at sea and nest on remote islands. Bridled Terns are more likely to be found near land or flotsam in tropical and subtropical waters.

Voice

Vocalizations are not a primary distinguishing feature in the field.