The royal sunangel (Heliangelus regalis) is an endangered species of hummingbird in the "coquettes", tribe Lesbiini of subfamily Lesbiinae.

The adult males are unique among genus Heliangelus: Their bodies are entirely dark blue.

[9] Adult females of the two subspecies are similar to those of the rest of genus Heliangelus and differ only slightly between them.

The amount of blue in males increases with age and typically the gorget is the first area to achieve it.

[9] The nominate subspecies of royal sunangel is mostly found in the Cordillera del Cóndor of Peru's Cajamarca and Amazonas departments, and also on the east slope of the Andes in Peru's departments of San Martín and Loreto.

It is also found in steep wooded ravines, and in Ecuador is most numerous on sandstone ridges with páramo-like vegetation but also in medium-elevation forest.

Both sexes often feed by perching on a flower rather than hovering, and they have been observed "robbing" nectar from holes pierced by other birds.

[9] The few records suggest that the royal sunangel's breeding season is from July to September.

It has a highly fragmented range, with a documented presence at fewer than 10 locations, and its specialized habitat is under threat from cultivation and deforestation.