This spectacular hummingbird was only discovered in 2017, and made headlines when it was described as a new species to science a year later. It is currently known only from one mountain in the Andes of southwestern Ecuador called Cerro de Arcos. Male’s entirely blue throat separates it from the otherwise similar Ecuadorian Hillstar, which does not overlap in range. Female is much duller than male, with greenish upperparts, brownish belly, and green speckles on the throat. Found in paramo at very high elevations, where it feeds on Chuquiraga flowers, which are orange and shaped like tiny pine cones.