Anna's Hummingbird vs Rufous-shafted Woodstar
Calypte anna เปรียบเทียบกับ Chaetocercus jourdanii
Side-by-Side Comparison
| คุณสมบัติ | Anna's Hummingbird | Rufous-shafted Woodstar |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Calypte anna | Chaetocercus jourdanii |
| อันดับ | Caprimulgiformes | Caprimulgiformes |
| วงศ์ตระกูล | Trochilidae | Trochilidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | 10.0 cm (3.9 in) | — |
| กว้างปีก | 12.0 cm (4.7 in) | 7.0 cm (2.8 in) |
| น้ำหนัก | 4.3 g (0.15 oz) | 3.26 g (0.11 oz) |
| อาหาร | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore of Trinidad and northern South America, hovering at bromeliads and Heliconia. Supplements diet with … |
| จำนวนไข่ | 2 | 2 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
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Anna's Hummingbird only
Rufous-shafted 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.
Rufous-shafted Woodstar
Deep, resonant single note with striking boldness; powerful tone ringing out clearly from exposed prominent perch.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Rufous-shafted Woodstar
Found in Andean highlands from Venezuela to Trinidad at 500-2,500 m elevation. Resident in montane forest edges and gardens.
สถานะการอนุรักษ์
Anna's Hummingbird
Rufous-shafted 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
Rufous-shafted Woodstar
Calliope Hummingbird (endemic): tiny; males with glittering magenta gorget; metallic green above; females plain 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.
Rufous-shafted Woodstar
A tiny hummingbird (7-8 cm) found in Andean highlands from Venezuela to Trinidad at 500-2,500 m. Males have rufous wing-shafts visible in flight and a purple gorget. Nectarivore of forest edges, gardens, and open country. Named after its rufous wing feather shafts.