Gelochelidon nilotica
The Gull-billed Tern (Gelochelidon nilotica) is a medium-sized, strikingly distinctive member of the tern family, immediately recognizable by its stocky build and a prominent, thick black bill that strongly resembles a small gull's, hence its evocative common name. Measuring 33-38 cm in length with an impressive wingspan of 76-84 cm and weighing 130-300g, it exhibits a crisp white body, pale grey upperparts, and, during the breeding season, a glossy black cap that extends to the nape. Its dir...
Primarily inhabits coastal and inland brackish or freshwater wetlands, including estuaries, salt marshes, lagoons, and agricultural fields, typically at low elevations.
Feeds predominantly on large insects (e.g., dragonflies, grasshoppers, beetles) caught in flight, but is opportunistic, taking small terrestrial vertebrates like lizards, frogs, crabs, and occasionally small fish, or eggs and chicks of other birds. Forages by aerial hawking, ground gleaning, or s...
Gull-billed Terns are diurnal and highly social, forming large, often dense, breeding colonies on secluded islands, sandbars, or dikes. Their foraging strategy is notably diverse; unlike many terns, they rarely plunge-dive for fish, instead specializing in aerial hawking of large insects such as ...
The Gull-billed Tern boasts an extraordinarily widespread, yet disjunct, global distribution, with four recognized subspecies spanning five continents. In North America, the subspecies *G. n. aranea* breeds primarily along the Atlantic and Gulf Coasts from New York south to Florida and along the ...
Least Concern
- The Gull-billed Tern's common name comes from its unusually stout, black bill, which is thicker and less pointed than that of most other tern species. - It holds the distinction of being one of the most widely distributed tern species globally, with breeding populations spanning five continents...