Anna's Hummingbird vs Blue Jay
Calypte anna เปรียบเทียบกับ Cyanocitta cristata
Side-by-Side Comparison
| คุณสมบัติ | Anna's Hummingbird | Blue Jay |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Calypte anna | Cyanocitta cristata |
| อันดับ | Caprimulgiformes | Passeriformes |
| วงศ์ตระกูล | Trochilidae | Corvidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | 10.0 cm (3.9 in) | 28.0 cm (11.0 in) |
| กว้างปีก | 12.0 cm (4.7 in) | 42.0 cm (16.5 in) |
| น้ำหนัก | 4.3 g (0.15 oz) | 87.0 g (3.07 oz) |
| อาหาร | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Omnivorous — nuts (especially acorns), seeds, berries, insects, and occasionally eggs or nestlings of other … |
| จำนวนไข่ | 2 | 2-7 |
| 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.
Blue Jay
Deciduous and mixed forests, parks, and suburban areas. Highly adaptable to human-modified landscapes.
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.
Blue Jay
A harsh, ringing 'jaay-jaay-jaay'. Also mimics Red-tailed Hawk and other species convincingly. Gives soft, liquid 'bell' calls and gurgling whispers in flocks.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Blue Jay
Eastern and central North America from southern Canada to the Gulf Coast. Some populations migrate irregularly.
สถานะการอนุรักษ์
Anna's Hummingbird
Blue Jay
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
Blue Jay
Bright blue upperparts with black barring on the wings and tail. White face and underparts with a black necklace. Prominent blue crest.
Stout, straight black bill
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.
Blue Jay
The blue jay is a bold, intelligent member of the corvid family known for its striking plumage and loud calls. Blue jays are important dispersers of oak trees, as they cache thousands of acorns each autumn. Their complex social behavior includes mimicking the calls of hawks to scare other birds from feeders.