Anna's Hummingbird vs Chilean Woodstar
Calypte anna compared with Eulidia yarrellii
Side-by-Side Comparison
| Attribute | Anna's Hummingbird | Chilean Woodstar |
|---|---|---|
| Scientific Name | Calypte anna | Eulidia yarrellii |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Trochilidae | Trochilidae |
| Conservation Status | Least Concern | Critically Endangered |
| Length | 10.0 cm (3.9 in) | — |
| Wingspan | 12.0 cm (4.7 in) | 6.6 cm (2.6 in) |
| Weight | 4.3 g (0.15 oz) | 2.38 g (0.08 oz) |
| Diet | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectar specialist of arid Atacama valleys, visiting cacti and Nicotiana. Supplements diet with small insects … |
| Clutch Size | 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.
Chilean Woodstar
Buzzy, high-pitched trill with insect-like quality; sustained rapid vibration with minimal melodic content.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Chilean Woodstar
Endemic to the hyper-arid coast of northern Chile from Arica to Antofagasta. Critically Endangered with fewer than 400 individuals.
Conservation Status
Anna's Hummingbird
Chilean 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
Chilean 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.
Chilean Woodstar
A tiny hummingbird (7-8 cm) endemic to the hyper-arid Atacama coast of northern Chile. Males have a purple throat and forked tail. Nectarivore of desert scrub and cultivated gardens. Critically Endangered with fewer than 400 individuals remaining due to habitat destruction.