Letitia's Thorntail

Graves described the specimens of Letitia's thorntail, but noted that the perceived colors of hummingbirds depend on the lighting and the observer's angle of view. The crown is brilliant golden-green that blends to dark bronze-green on the back with some coppery-bronze iridescence. The lower back is crossed by a narrow white band below which is a coppery red to coppery purple rump and bronze-green uppertail coverts. The chin and upper breast are golden-green like the crown with a diffuse pale pectoral band below the latter.