Anna's Hummingbird vs Green-tailed Goldenthroat
Calypte anna ile kıyaslandığında Polytmus theresiae
Side-by-Side Comparison
| Özellik | Anna's Hummingbird | Green-tailed Goldenthroat |
|---|---|---|
| Bilimsel Ad | Calypte anna | Polytmus theresiae |
| Takım | Caprimulgiformes | Caprimulgiformes |
| Familya | Trochilidae | Trochilidae |
| Koruma Durumu | Least Concern | Least Concern |
| Uzunluk | 10,0 cm (3.9 in) | — |
| Kanat Açıklığı | 12,0 cm (4.7 in) | 11,3 cm (4.4 in) |
| Ağırlık | 4,3 g (0.15 oz) | 3,575 g (0.13 oz) |
| Beslenme | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore of open wetland margins and savanna; forages at diverse flower types. Takes tiny flies … |
| Kuluçka Büyüklüğü | 2 | 2 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Ortak Yaşam Alanları
Hiçbiri
Anna's Hummingbird only
Green-tailed Goldenthroat 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.
Green-tailed Goldenthroat
Rough, grating buzz with coarse texture; sustained low-pitched trill with vibrating quality audible over some distance.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Green-tailed Goldenthroat
Found in open savanna and forest edges of the Guianas and Amazonian Venezuela and Brazil. Sea level to 600 m.
Koruma Durumu
Anna's Hummingbird
Green-tailed Goldenthroat
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
Green-tailed Goldenthroat
White-chinned Sapphire: males with glittering violet gorget and white chin; metallic green above; females with spotted white throat
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.
Green-tailed Goldenthroat
A medium-sized hummingbird (10-11 cm) found in humid lowland forests and edges from the Guianas through Amazonia to Bolivia and Brazil. Green plumage with a golden-green throat and greenish tail. Nectarivore of forest edges and clearings.