Green-headed Hillstar (Oreotrochilus stolzmanni) [XC380426]
by Niels Krabbe from Ancash: near Mishquicuyucu, Yanac-Sihuas pass, Peru (call, chase calls)
Green-headed Hillstar (Oreotrochilus stolzmanni) [XC380428]
by Charlie Vogt from Ancash: near Mishquicuyucu, Yanac-Sihuas pass, Peru (call, song, song\/call from perch)
Subspecies
Forms a superspecies with Andean Hillstar (Oreotrochilus estella), Ecuadorian Hillstar (Oreotrochilus chimborazo) and White-sided Hillstar (Oreotrochilus leucopleurus), and all have been considered conspecific, but separated largely on morphological grounds. Frequently lumped into Andean Hillstar (Oreotrochilus estella).
Considered by some authors to be a subspecies of Andean Hillstar (Oreotrochilus estella).