Rivoli's Hummingbird vs Blue-throated Mountain-gem

In short

Rivoli's Hummingbird and Blue-throated Mountain-gem are both large hummingbirds, but Rivoli's is slightly smaller and less aggressive. Rivoli's has a distinctive green throat in males, while Blue-throated males have a blue throat. Both species are found in similar habitats, but Blue-throated is more likely to be seen at feeders due to its assertive nature.

Identification tips

1. Throat color: Look for a green throat in male Rivoli's and a blue throat in male Blue-throated. 2. Crown color: Rivoli's males have a purple crown. 3. Behavior: Note the aggressive behavior at feeders, typical of Blue-throated. 4. Size: Blue-throated is generally larger. 5. Vocalizations: Listen for complex songs from Blue-throated, especially from females.

Size

Rivoli's Hummingbird is slightly smaller than the Blue-throated Mountain-gem.

Plumage

Male Rivoli's Hummingbirds have a green throat and a purple crown, whereas male Blue-throated Mountain-gems have a blue throat and lack the purple crown. Females of both species are less colorful and more similar, but Rivoli's females may show a more uniform grayish underpart.

Behaviour

Blue-throated Mountain-gems are notably aggressive and often dominate feeding stations, while Rivoli's Hummingbirds are less aggressive.

Habitat

Both species inhabit montane forests and are often found at high elevations. However, Blue-throated Mountain-gems are more frequently observed at artificial feeders.

Voice

Blue-throated Mountain-gems have complex vocalizations, including songs from both males and females, which are unusual for hummingbirds. Rivoli's Hummingbirds are less vocal.