| Laridae () |
| 33 cm TL (male/unsexed); max.weight: 160.0 g |
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others; marine |
| Indo-Pacific and Atlantic Ocean |
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Culmen: 3.2 cm; tarsus: 1.44 cm; wing: 25.2 cm. |
| Total Length: 28 to 33 cm; Wingspan: 70 to 87 cm (Ref. 8812). Coastal (Ref. 356). Exclusively marine. Breeds at many tropical and subtropical oceanic islands (Ref. 91362). Solitary breeder; uniquely, lays a single egg on tree branch without any nest. Inquisitive; hovers around nest site in presence of human intruders (Ref. 91362). Exhibits dipping behavior (Ref. 356) or surface diving (Ref. 122680). Feeds mainly on fish (Refs. 81748, 122680) driven to the surface by large, predatory fish (Ref. 122680). Diet consists mostly of juvenile goatfish and flying fish (Ref. 122680). |
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(LC); Date assessed: 17 August 2022 Ref. 123251)
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Known from Henderson (Refs. 87896, 87921). It was reported to be plentiful (Ref. 87897), and observed to be breeding on the island (Ref. 6661). Breeding populations are estimated to be a few hundred on Pitcairn, several hundred to 1000 on Oeno, and several thousand to about 10000 on Henderson (Ref. 5718). C: Ref. 87896, 87897, 6661, 5718. |
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