Anna's Hummingbird vs Short-tailed Emerald
Calypte anna เปรียบเทียบกับ Chlorostilbon poortmani
Side-by-Side Comparison
| คุณสมบัติ | Anna's Hummingbird | Short-tailed Emerald |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Calypte anna | Chlorostilbon poortmani |
| 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) | 8.2 cm (3.2 in) |
| น้ำหนัก | 4.3 g (0.15 oz) | 3.5 g (0.12 oz) |
| อาหาร | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Feeds on nectar from scrub and forest-edge flowers in Colombia and Venezuela. Supplements with small … |
| จำนวนไข่ | 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.
Short-tailed Emerald
Thin, reedy chip note with soft delivery; barely audible single staccato sound given from dense cover.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Short-tailed Emerald
Found in Andean cloud forests from Colombia to Venezuela at 1,500-2,800 m elevation. Resident in montane forest.
สถานะการอนุรักษ์
Anna's Hummingbird
Short-tailed Emerald
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
Short-tailed Emerald
Polyerata hummingbird: males with glittering green gorget; metallic green above; white underparts; females green above; spotted below
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.
Short-tailed Emerald
A small hummingbird (7-8 cm) found in Andean cloud forests from Colombia to Venezuela at 1,500-2,800 m. Green plumage with a notably short tail. Nectarivore of montane forest undergrowth and edges. Named for its unusually short tail for an emerald.