A flash of purple crown and emerald throat makes for a magnificent hummingbird—and that happens to be a former name for Rivoli’s Hummingbird. These large, dark hummingbirds live in mountainous pine-oak forests and shady canyons between Nicaragua and the extreme southwestern United States. Despite its size, this species normally does not push around other hummingbirds at flowers or feeders. Instead, it “traplines,” traveling along a steady route between widely spaced patches of flowers, where it uses its very long bill to sip nectar.

Nests in cool mountain canyons, often near streams and creeks. Forages at middle elevations in forests and mountain meadows, between about 5,000 and 9,000 feet elevation.

The Rivoli's Hummingbird is the second-largest hummingbird north of Mexico. Only the Blue-throated Mountain-gem is larger.

Rivoli's Hummingbirds have one of the highest recorded heart rates of any vertebrate, ranging from 420–1,200 beats per minute.

https://www.allaboutbirds.org/guide/Rivolis_Hummingbird/overview#