Charrán Patinegro vs Colimbo Ártico

The Sandwich Tern and Black-throated Diver are distinct in both appearance and habitat. The Sandwich Tern is a coastal bird with a slender, pointed bill, while the Black-throated Diver is a freshwater and marine diver with a robust, dagger-like bill. These differences are key for identification.

1. Bill shape: Sandwich Tern has a slender, pointed bill; Black-throated Diver has a robust, dagger-like bill. 2. Habitat: Look for Sandwich Terns along coasts and Black-throated Divers on lakes or coastal waters. 3. Behavior: Sandwich Terns dive in flocks; Black-throated Divers dive alone or in pairs.

The Black-throated Diver is generally larger and more robust compared to the more slender and smaller Sandwich Tern.

Sandwich Tern has a distinctive black cap and a white body, whereas the Black-throated Diver features a striking black throat patch during breeding season and a more patterned plumage.

Sandwich Terns are often seen in flocks, diving for fish near the coast. Black-throated Divers are typically solitary or in pairs, diving in deeper waters.

Sandwich Terns are typically found along coastal regions, while Black-throated Divers inhabit freshwater lakes during breeding and coastal waters in winter.