Anna's Hummingbird vs Black-bellied Thorntail
Calypte anna مقارنةً بـ Discosura langsdorffi
Side-by-Side Comparison
| السمة | Anna's Hummingbird | Black-bellied Thorntail |
|---|---|---|
| الاسم العلمي | Calypte anna | Discosura langsdorffi |
| الرتبة | Caprimulgiformes | Caprimulgiformes |
| الفصيلة | Trochilidae | Trochilidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | 10,0 cm (3.9 in) | — |
| طول الجناح | 12,0 cm (4.7 in) | 7,0 cm (2.8 in) |
| الوزن | 4,3 g (0.15 oz) | 3,2 g (0.11 oz) |
| النظام الغذائي | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore visiting diverse canopy flowers in humid Amazonian forest. Takes small arthropods in aerial hover-gleaning. |
| عدد البيض في الوضع | 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.
Black-bellied Thorntail
Deep, hollow churring with resonant character; prolonged low buzzing sound vibrating persistently through dense foliage.
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-bellied Thorntail
Found in lowland Amazonian forest from southeastern Colombia south through Ecuador and Peru to Bolivia. 100–600 m.
حالة الحفاظ
Anna's Hummingbird
Black-bellied 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
Black-bellied Thorntail
Red-tailed Comet: males with glittering green gorget; brilliant coppery-bronze crown; metallic green back; reddish tail; females duller
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-bellied Thorntail
A tiny hummingbird (7-8 cm plus extended tail feathers) found in lowland forests from eastern Colombia through Amazonia to Bolivia and Brazil. Males have dark belly and long, wire-like outer tail feathers with racket tips. Nectarivore of forest canopy and edges.