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Heliangelus regalis

National Institutes of Health

Papers overview

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2011
2011
Taxonomic notes on hummingbirds ( Aves : Trochilidae ) . 3 . Heliangelus vioticotlis Salvin , 1891 is a color variant of Heliangelus stropfiianus ( Gould , 1846 )
—The holotype of Heliangelus violicollis Salvin. 189], reportedly from "Sarayacu" on the Amazonian slope of the Ecuadorian Andes… 
2000
2000
Taxonomic Notes On Hummingbirds (Aves : Trochilidae). 3. Heliangelus Violicollis Salvin, 1891 Is A Color Variant Of Heliangelus Strophianus
1996
1996
Recent observations and notes on the ecology of the Royal Sunangel Heliangelus regalis