Anna's Hummingbird vs Black-billed Streamertail
Calypte anna เปรียบเทียบกับ Trochilus scitulus
Side-by-Side Comparison
| คุณสมบัติ | Anna's Hummingbird | Black-billed Streamertail |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Calypte anna | Trochilus scitulus |
| 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) | 13.0 cm (5.1 in) |
| น้ำหนัก | 4.3 g (0.15 oz) | 4.7 g (0.17 oz) |
| อาหาร | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore probing tubular flowers in humid forest. Supplements nectar diet with small insects and spiders … |
| จำนวนไข่ | 2 | 2 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
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Anna's Hummingbird only
Black-billed Streamertail 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.
Black-billed Streamertail
Buzzy, insect-like sustained trill; continuous high-frequency vibration with rapid modulation near nectar flowers.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Black-billed Streamertail
Endemic to the eastern Blue Mountains of Jamaica. Restricted to montane forest. Sometimes treated as subspecies.
สถานะการอนุรักษ์
Anna's Hummingbird
Black-billed Streamertail
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
Black-billed Streamertail
Black-faced Coucal: glossy black head; rufous-brown wings; black underparts; red eye; long dark tail; sexually similar plumage
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.
Black-billed Streamertail
A hummingbird (9-10 cm body + long tail streamers in males) endemic to the eastern Blue Mountains of Jamaica. Males similar to Red-billed Streamertail but with a black bill. Nectarivore of montane forest. Sometimes considered a subspecies of Red-billed Streamertail.