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A photo of a Rivoli's Hummingbird (Eugenes fulgens), male
Rivoli's Hummingbird, Male

Rivoli's Hummingbird

Eugenes fulgens

The Rivoli's hummingbird, or Eugenes fulgens, is a striking member of the hummingbird family. This species, also known as the magnificent hummingbird, is one of the largest hummingbirds found in the United States, sharing the title with the blue-throated hummingbird. Males are slightly larger than females, with a body length ranging from 11 to 14 cm and a wingspan of approximately 18 cm. They weigh between 6 to 10 grams. The Rivoli's hummingbird is a dazzling creature, particularly when sunlight illuminates its iridescent plumage, revealing a spectrum of vibrant colors.

Identification Tips

The male Rivoli's hummingbird boasts a green-bronze dorsal side that transitions to a more bronzed hue on the black-tipped tail. Its crown shimmers with violet, while the throat gorget glows with a bright blue-green. The rest of the head is black, save for a white spot behind the eye, and the chest mirrors the green-bronze of the back, leading to a grayish belly. The female, on the other hand, is bronze-green dorsally with a dull gray underside and a distinctive white stripe behind her eye. Immature birds resemble the female but are darker and browner.

Habitat

This species thrives in the mountainous regions, making its home in the interior and edges of pine-oak forests and cloud forests, from about 1,500 meters up to the timberline. It can also be found in secondary forests, grasslands, and is known to frequent bird feeders.

Distribution

Rivoli's hummingbird has a breeding range that extends from the southwestern United States through to Honduras and Nicaragua.

Behaviour

Partially migratory, the Rivoli's hummingbird is a year-round resident from north-central Mexico to northern Nicaragua. It breeds in southeastern Arizona and possibly in southwestern New Mexico and other Mexican states but does not overwinter there. It is subordinate to the larger blue-throated hummingbird but coexists with various other hummingbird species.

Song & Calls

The vocal repertoire of the Rivoli's hummingbird may include a loud or high-pitched "tchik" or "tcheep," as well as a possible song that is a short chatter of notes rising and falling. Males emit single or a series of chip notes both while perched and in flight, and a rapid sequence of chip notes can be heard during aggressive or alarmed states.

Breeding

The breeding season in the U.S. spans from May to July and may occur year-round in El Salvador. The female builds an open cup nest adorned with lichen, using soft feathers and moss bound with spider silk. The nest is typically placed on a horizontal branch or in a fork, often above streams and at least 6 meters off the ground. The female incubates two white eggs, with the incubation and fledging periods resembling those of other hummingbirds.

Diet and Feeding

Rivoli's hummingbird feeds on nectar from a diverse array of flowering plants, with the specific varieties varying by season, elevation, and latitude. In some parts of Mexico, males defend feeding territories. The species also consumes small insects, which constitute a significant portion of its diet compared to other North American hummingbirds.

Conservation status

The IUCN, following the HBW taxonomy, considers the Rivoli's and Talamanca hummingbirds as a single species and assesses them as Least Concern. The species has a large range and a stable population, though the exact numbers are unknown. Potential threats include forest fires in the U.S. and habitat destruction in southern Mexico and Central America.

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Rivoli's Hummingbird Fun Facts

Did you know?
Rivoli's Hummingbirds have one of the fastest heart rates, ranging from 420-1,200 beats per minute.

Rivoli's Hummingbirds on Birda

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