Anna's Hummingbird vs Coppery Thorntail
Calypte anna 比較対象 Discosura letitiae
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Coppery Thorntail |
|---|---|---|
| 学名 | Calypte anna | Discosura letitiae |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Least Concern | Data Deficient |
| 体長 | 10.0 cm (3.9 in) | — |
| 翼開長 | 12.0 cm (4.7 in) | 7.5 cm (3.0 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 with elongated tail foraging at high canopy blooms. Catches small insects near flowering trees. |
| 一腹卵数 | 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.
Coppery Thorntail
Soft, high peep followed by short buzzy trill; quiet introductory note launching into brief rough continuation.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Coppery Thorntail
Known only from Bolivia; restricted range in humid lowland forest of the Beni region. 150–500 m elevation.
保全状況
Anna's Hummingbird
Coppery Thorntail
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
Coppery Thorntail
Rufous Puffleg: males shining bronze-green; iridescent teal gorget; white underparts; large rufous leg puffs; females duller with spots
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.
Coppery Thorntail
A tiny hummingbird (7-8 cm) known from very few specimens collected in Bolivia. Coppery plumage. Almost nothing known about its ecology or current status. One of the most mysterious hummingbirds; possibly rare, possibly overlooked. Further fieldwork needed.