Anna's Hummingbird vs Booted Racket-tail
Calypte anna 比較対象 Ocreatus underwoodii
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Booted Racket-tail |
|---|---|---|
| 学名 | Calypte anna | Ocreatus underwoodii |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 10.0 cm (3.9 in) | — |
| 翼開長 | 12.0 cm (4.7 in) | 8.5 cm (3.3 in) |
| 体重 | 4.3 g (0.15 oz) | 2.8 g (0.10 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore of Andean foothill forest; visits Ericaceae and Heliconia flowers. Catches small insects in aerial … |
| 一腹卵数 | 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.
Booted Racket-tail
Melodic, rolling phrase with liquid quality; warm bubbly notes tumbling in pleasant continuous musical sequence.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Booted Racket-tail
Widespread in Andean foothill and cloud forests from Venezuela south through Colombia, Ecuador, and Peru. 200–1,800 m.
保全状況
Anna's Hummingbird
Booted Racket-tail
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
Booted Racket-tail
Blue-throated Starfrontlet: males with glittering blue gorget; metallic bronze-green; females green above; spotted buff underparts
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.
Booted Racket-tail
A small hummingbird (8-10 cm plus 5-7 cm tail rackets in males) widely distributed in Andean cloud forests from Venezuela to Bolivia at 1,500-3,000 m. Males have long, wire-like outer tail feathers ending in dark blue racket tips and fluffy white leg puffs. A cloud forest icon.