Anna's Hummingbird vs White-bellied Woodstar
Calypte anna compared with Chaetocercus mulsant
Side-by-Side Comparison
| Attribute | Anna's Hummingbird | White-bellied Woodstar |
|---|---|---|
| Scientific Name | Calypte anna | Chaetocercus mulsant |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Trochilidae | Trochilidae |
| Conservation Status | Least Concern | Least Concern |
| Length | 10.0 cm (3.9 in) | — |
| Wingspan | 12.0 cm (4.7 in) | 7.8 cm (3.1 in) |
| Weight | 4.3 g (0.15 oz) | 3.9 g (0.14 oz) |
| Diet | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Feeds on floral nectar in Andean cloud forest, favouring small-flowered herbs. Supplements with spiders and … |
| Clutch Size | 2 | -- |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Shared Habitats
None
Anna's Hummingbird only
White-bellied Woodstar only
Anna's Hummingbird
Chaparral, coastal sage scrub, gardens, parks, and open woodland along the Pacific coast. One of few hummingbirds not fully migratory.
Song & Call Comparison
Anna's Hummingbird
Male produces a complex, scratchy song with buzzy 'dzzzzt' notes. Gives a nasal 'chee-chee-chee'. Males sing year-round, even in winter; one of few hummingbirds with true song.
White-bellied Woodstar
Melodic, pure ascending phrase with bright character; clear notes rising smoothly in animated morning territorial song.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
White-bellied Woodstar
Found in Andean cloud forests from Colombia to Bolivia at 1,500-3,500 m elevation. Resident across the northern and central Andes.
Conservation Status
Anna's Hummingbird
White-bellied Woodstar
How to Tell Them Apart
Anna's Hummingbird
Metallic bronze-green upperparts. Males have an iridescent rose-red crown and gorget. Females have green upperparts with grey underparts and a small red gorget patch.
Medium-length, straight, thin black bill
White-bellied Woodstar
Beautiful Sheartail: males with brilliant violet-purple gorget; metallic green above; white underparts; females green above; spotted
About These Birds
Anna's Hummingbird
Anna's hummingbird is the most common hummingbird along the Pacific coast and one of only three species resident in the United States year-round. Males perform spectacular dive displays, plummeting from 40 meters and pulling up with a loud chirp produced by tail feathers. Their body temperature can drop to near ambient at night to conserve energy.
White-bellied Woodstar
A tiny hummingbird (7-8 cm) found in Andean cloud forests from Colombia to Bolivia at 1,500-3,500 m. Males have a white belly and iridescent gorget. Nectarivore of forest edges and flowering shrubs. One of the most widespread Andean woodstars.