Anna's Hummingbird vs Esmeraldas Woodstar
Calypte anna compared with Chaetocercus berlepschi
Side-by-Side Comparison
| Attribute | Anna's Hummingbird | Esmeraldas Woodstar |
|---|---|---|
| Scientific Name | Calypte anna | Chaetocercus berlepschi |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Trochilidae | Trochilidae |
| Conservation Status | Least Concern | Vulnerable |
| Length | 10.0 cm (3.9 in) | — |
| Wingspan | 12.0 cm (4.7 in) | 5.3 cm (2.1 in) |
| Weight | 4.3 g (0.15 oz) | 2.505 g (0.09 oz) |
| Diet | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Critically rare; feeds on nectar from flowering shrubs in Ecuadorian lowland forest. Takes small insects … |
| Clutch Size | 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.
Esmeraldas Woodstar
Soft, melodic warbling with flowing character; gentle notes weaving smoothly in quiet phrase at forest edge.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Esmeraldas Woodstar
Endemic to western Ecuador in the Chocó lowlands and foothills. Classified as Endangered due to severe deforestation.
Conservation Status
Anna's Hummingbird
Esmeraldas 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
Esmeraldas Woodstar
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.
Esmeraldas Woodstar
A tiny hummingbird (7 cm) endemic to western Ecuador. Males have a glittering gorget. Nectarivore of lowland and foothill forest edges. Classified as Endangered due to severe Chocó rainforest loss. One of the most threatened Ecuadorian hummingbirds.