Sandwich Tern (Thalasseus sandvicensis)

Order: Charadriiformes Family: Laridae | IUCN Status: Least Concern

Age: Adult, basic | Sex: Unknown | Loc. No Data

Age: Adult, alternate | Sex: Unknown | Loc. North America

Age: Adult, alternate | Sex: Unknown | Loc. North America

Age: Adult, basic | Sex: Unknown | Loc. Paracas, Ica

Identification & Behavior: ~39.5 cm (15.5 in). The Sandwich Tern in basic plumage has a white forehead and black rest of the cap.  In alternate plumage, it has a solid black cap that projects towards the nape area. In both plumages, the bill is black with a distinctive yellow tip. The bill of the Snowy-crowned Tern (vagrant in Peru) in basic plumage is similar to that of a Sandwich Tern, but the Sandwich tern has black on top of head versus white in Snowy-crowned Tern.

Status: The Sandwich Tern is an uncommon to rare Boreal migrant to the coast of Peru. It also occurs in Co, Ec, Br, and Ch.

Name in Spanish: Gaviotín de Pata Negra.

Sub-species: Sandwich Tern (Thalasseus sandvicensis acuflavidus), S. Cabot 1847.

Meaning of Name: Thalasseus: Gr. Thalasseus, Thalassa= sea fisherman. sandvicensis: after the town of Sandwich, Kent, England.

See more of the Family Laridae   peru aves

Distribution Map
sandwich ternVoice


    • Species range based on: Schulenberg, T. S., D. F. Stotz, and L. Rico. 2006. Distribution maps of the birds of Peru, version 1.0. Environment, Culture & Conservation (ECCo). The Field Museum. on 01/01/2015.