Notharchus macrorhynchos hyperrhynchus
It is found in forest and woodland from southern Mexico through Central America to the Chocó, northern Colombia (including Magdalena Valley), northern Venezuela, and the western and southern Amazon Basin.
It was formerly considered a subspecies of the Guianan puffbird (N. macrorhynchos). The two differ markedly in bill-size (N. hyperrhynchus larger-billed than N. macrorhynchos), plumage (among other things, N. hyperrhynchus has less black to the flanks and more white to the forecrown than N. macrorhynchos), and voice. Consequently, the two were separated by SACC in 2004.
- BirdLife International (2012). "Notharchus hyperrhynchus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- Split Notharchus hyperrynchus from N. macrorhynchos. South American Classification Committee. Accessed 2008-08-07
- White-necked puffbird videos on the Internet Bird Collection
- Stamps (for Belize) with RangeMap
- White-necked puffbird photo gallery VIREO
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