Anna's Hummingbird vs Little Woodstar
Calypte anna so với Chaetocercus bombus
Side-by-Side Comparison
| Thuộc Tính | Anna's Hummingbird | Little Woodstar |
|---|---|---|
| Tên Khoa Học | Calypte anna | Chaetocercus bombus |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Trochilidae | Trochilidae |
| Tình Trạng Bảo Tồn | Least Concern | Near Threatened |
| Chiều Dài | 10,0 cm (3.9 in) | — |
| Chiều Dài Sải Cánh | 12,0 cm (4.7 in) | 5,6 cm (2.2 in) |
| Khối Lượng | 4,3 g (0.15 oz) | 6,5 g (0.23 oz) |
| Chế Độ Ăn | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | One of the world's smallest birds; feeds on nectar from tiny blossoms in humid forest … |
| Số Trứng | 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.
Little Woodstar
Harsh, scratchy buzz with coarse texture; sustained rough vibration with raspy edges carrying across scrub habitat.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Little Woodstar
Found in Andean foothill forests from Colombia to Peru at 800-2,200 m. Classified as Vulnerable due to habitat loss.
Tình Trạng Bảo Tồn
Anna's Hummingbird
Little 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
Little Woodstar
Ruby-topaz Hummingbird: males with glittering golden-red topaz crown; iridescent ruby gorget; metallic green back; 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.
Little Woodstar
A tiny hummingbird (7 cm) found in Andean foothill forests from Colombia to Peru at 800-2,200 m. Small even for a woodstar. Purple throat (males). Nectarivore of forest edges. Classified as Vulnerable due to habitat loss. One of the smallest hummingbirds.