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Mexican Species
| Gull-billed Tern (Gelochelidon nilotica) | |||
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| Subspecies | Hide subspecies | ||
| nilotica | nilotica (Gull-billed) | Palearctic; winters tropical Africa and Persian Gulf to India | |
| affinis | nilotica (Gull-billed) | Transbaikalia to Manchuria and e China; winters SE Asia | |
| aranea | nilotica (Gull-billed) | E US to Gr. Antilles and Yucatán; winters to Brazil and Peru | |
| vanrossemi | nilotica (Gull-billed) | California to n Baja and nw Mexico; winters to Ecuador | |
| gronvoldi | nilotica (Gull-billed) | Coasts and rivers of French Guiana to ne Argentina | |
| macrotarsa | macrotarsa (Australian) | Australia (except arid areas) | |
| Endemic status | Not endemic | ||
| Birds (media) | Yes | ||
| Sound Guide | |||
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