Anna's Hummingbird vs Mexican Sheartail
Calypte anna 比較対象 Doricha eliza
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Mexican Sheartail |
|---|---|---|
| 学名 | Calypte anna | Doricha eliza |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Least Concern | Near Threatened |
| 体長 | 10.0 cm (3.9 in) | — |
| 翼開長 | 12.0 cm (4.7 in) | 7.7 cm (3.0 in) |
| 体重 | 4.3 g (0.15 oz) | 2.5 g (0.09 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore of dry scrub and coastal dunes, visiting Agave and Ipomoea flowers. Supplements with insects … |
| 一腹卵数 | 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.
Mexican Sheartail
Melodic, three-note ascending call; pure warm tones stepping upward smoothly, given clearly from tall perch.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Mexican Sheartail
Endemic to the Yucatán Peninsula of Mexico and Cozumel Island. Classified as Near Threatened due to habitat destruction.
保全状況
Anna's Hummingbird
Mexican Sheartail
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
Mexican Sheartail
Xantus's Hummingbird: males with glittering green gorget; metallic green above; rufous tail; cinnamon underparts; sexually dimorphic
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.
Mexican Sheartail
A tiny hummingbird (8-9 cm) endemic to the Yucatán Peninsula of Mexico and Cozumel Island. Males have elongated, slender outer tail feathers. Nectarivore of coastal scrub and gardens. Classified as Near Threatened due to habitat destruction in its limited range.