29-1-2025 PORT OF PALERMO, ITALY - SANDWICH TERN (Thalasseus sandvicensis)

The Sandwich tern, Thalasseus sandvicensis, is a medium-large tern with a graceful profile, characterized by its grey upperparts and white underparts. A striking feature is its yellow-tipped black bill, complemented by a shaggy black crest during the breeding season, which recedes to reveal a white crown in winter. The young display a scalloped pattern on their backs and wings, with hues of grey and brown.

Adult Sandwich terns can be identified by their slender black bills with a distinctive yellow tip and their pale grey upper wings. In flight, they appear particularly pale, with the exception of their primary flight feathers which darken over the summer. Juveniles can be recognized by the dark tips on their tails and the scaly pattern on their back and wings.

This species is typically found along coasts and islands, and occasionally by large freshwater lakes near the coast.

The Sandwich tern breeds across the Palearctic from Europe to the Caspian Sea and migrates to winter in South Africa, India, and Sri Lanka.

Sandwich terns are known for their dense and sociable breeding colonies. They nest in simple ground scrapes, laying one to three eggs. Their feeding technique involves plunge-diving for fish, primarily in marine environments. Courtship includes the male offering fish to the female.

The Sandwich tern is quite vocal, emitting a loud grating call that can be transcribed as "kear-ik" or "kerr ink."

Breeding occurs in dense colonies where the Sandwich tern lays its eggs in a ground scrape. The species is not overly aggressive in defending its nest, often relying on the proximity of more defensive species for protection.

26-6-2024 RACO DE OLLA, VALENCIA - SANDWICH TERN (Thalasseus sandvicensis)

The Sandwich tern (Thalasseus sandvicensis ) is a tern in the family Laridae. It is very closely related to the lesser crested tern (T. bengalensis ), Chinese crested tern (T. bernsteini ), Cabot's tern (T. acuflavidus ), and elegant tern (T. elegans ) and has been known to interbreed with the lesser crested. It breeds in the Palearctic from Europe to the Caspian Sea wintering to South Africa, India and Sri Lanka.

The Sandwich tern is a medium-large tern with grey upperparts, white underparts, a yellow-tipped black bill and a shaggy black crest which becomes less extensive in winter with a white crown. Young birds bear grey and brown scalloped plumage on their backs and wings. It is a vocal bird. It nests in a ground scrape and lays one to three eggs.

Like all Thalasseus terns, the Sandwich tern feeds by plunge diving for fish, usually in marine environments, and the offering of fish by the male to the female is part of the courtship display.

29-6-2016 RACO DE OLLA, VALENCIA - SANDWICH TERN (Thalasseus sandvicensis)

The Sandwich tern (Thalasseus sandvicensis ) is a tern in the family Laridae. It is very closely related to the lesser crested tern (T. bengalensis ), Chinese crested tern (T. bernsteini ), Cabot's tern (T. acuflavidus ), and elegant tern (T. elegans ) and has been known to interbreed with the lesser crested. It breeds in the Palearctic from Europe to the Caspian Sea wintering to South Africa, India and Sri Lanka.

The Sandwich tern is a medium-large tern with grey upperparts, white underparts, a yellow-tipped black bill and a shaggy black crest which becomes less extensive in winter with a white crown. Young birds bear grey and brown scalloped plumage on their backs and wings. It is a vocal bird. It nests in a ground scrape and lays one to three eggs.

Like all Thalasseus terns, the Sandwich tern feeds by plunge diving for fish, usually in marine environments, and the offering of fish by the male to the female is part of the courtship display.

21-6-2017 ALBUFERA, VALENCIA - SANDWICH TERN (Thalasseus sandvicensis)

The Sandwich tern, Thalasseus sandvicensis, is a medium-large tern with a graceful profile, characterized by its grey upperparts and white underparts. A striking feature is its yellow-tipped black bill, complemented by a shaggy black crest during the breeding season, which recedes to reveal a white crown in winter. The young display a scalloped pattern on their backs and wings, with hues of grey and brown.

Adult Sandwich terns can be identified by their slender black bills with a distinctive yellow tip and their pale grey upper wings. In flight, they appear particularly pale, with the exception of their primary flight feathers which darken over the summer. Juveniles can be recognized by the dark tips on their tails and the scaly pattern on their back and wings.

This species is typically found along coasts and islands, and occasionally by large freshwater lakes near the coast.

The Sandwich tern breeds across the Palearctic from Europe to the Caspian Sea and migrates to winter in South Africa, India, and Sri Lanka.

Sandwich terns are known for their dense and sociable breeding colonies. They nest in simple ground scrapes, laying one to three eggs. Their feeding technique involves plunge-diving for fish, primarily in marine environments. Courtship includes the male offering fish to the female.

The Sandwich tern is quite vocal, emitting a loud grating call that can be transcribed as "kear-ik" or "kerr ink."

Breeding occurs in dense colonies where the Sandwich tern lays its eggs in a ground scrape. The species is not overly aggressive in defending its nest, often relying on the proximity of more defensive species for protection.

The Sandwich tern could be confused with the lesser crested tern or the elegant tern, which have all-orange bills. The Chinese crested tern is very similar but has a yellow bill with a black tip and does not share its range with the Sandwich tern, making confusion unlikely.

The diet consists mainly of fish, which are caught by skillful plunge-diving. This method of feeding is a spectacle in itself, as the terns dive directly into the water from flight.

The Sandwich tern is classified as Least Concern by the IUCN, with an estimated global population of 460,000–500,000 individuals. It is subject to conservation actions under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA).