Anna's Hummingbird vs White-sided Hillstar
Calypte anna comparé à Oreotrochilus leucopleurus
Side-by-Side Comparison
| Attribut | Anna's Hummingbird | White-sided Hillstar |
|---|---|---|
| Nom scientifique | Calypte anna | Oreotrochilus leucopleurus |
| Ordre | Caprimulgiformes | Caprimulgiformes |
| Famille | Trochilidae | Trochilidae |
| Statut de conservation | Least Concern | Least Concern |
| Longueur | 10,0 cm (3.9 in) | — |
| Envergure | 12,0 cm (4.7 in) | 13,6 cm (5.4 in) |
| Poids | 4,3 g (0.15 oz) | 6,6 g (0.23 oz) |
| Régime alimentaire | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore foraging above treeline at sparse Ericaceae and Chuquiraga patches. Supplements with small arthropods. |
| Taille de la couvée | 2 | 2 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
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-sided Hillstar
Melodic, ascending phrase with hopeful character; smooth pure tones rising steadily in clear musical progression at dawn.
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-sided Hillstar
Found in the Andes and Patagonian steppe of Argentina and Chile from 1,000–4,000 m. Partly migratory.
Statut de conservation
Anna's Hummingbird
White-sided Hillstar
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-sided Hillstar
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-sided Hillstar
A medium-sized hummingbird (12-13 cm) found in the southern Andes from Bolivia to Argentina at 2,500-4,500 m. Green plumage with white flanks. Nectarivore of puna grasslands and rocky slopes. Enters torpor nightly to survive cold Andean nights. Southern Andean near-endemic.