Black-billed Nightingale-thrush vs Eastern Bluebird
Catharus gracilirostris 对比 Sialia sialis
Side-by-Side Comparison
| 属性 | Black-billed Nightingale-thrush | Eastern Bluebird |
|---|---|---|
| 学名 | Catharus gracilirostris | Sialia sialis |
| 目 | Passeriformes | Passeriformes |
| 科 | Turdidae | Turdidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | 17.5 cm (6.9 in) |
| 翼展 | 15.2 cm (6.0 in) | 27.0 cm (10.6 in) |
| 体重 | 20.450000000000003 g (0.72 oz) | 31.0 g (1.09 oz) |
| 食性 | -- | Insects in summer, berries in winter. Hunts from low perches, dropping to the ground to … |
| 产卵数 | 2 | 4-5 |
| Population Trend | — | — |
Size Comparison
Body Length
Black-billed Nightingale-thrush
—
Eastern Bluebird
17.5 cm
翼展
Black-billed Nightingale-thrush
15.2 cm
Eastern Bluebird
27.0 cm
体重
Black-billed Nightingale-thrush
20.450000000000003 g
Eastern Bluebird
31.0 g
Habitat Comparison
Eastern Bluebird
Open woodland, farmland edges, orchards, and parks with scattered trees and open ground. Readily uses nest boxes.
Song & Call Comparison
Black-billed Nightingale-thrush
Eastern Bluebird
鸣唱
A rich, melodious warbled 'chur-wi, tur-a-lee' song. Both sexes sing. Call is a soft, musical 'turee'. Song is gentle and flute-like, suggesting a small thrush. Given from exposed perch.
Geographic Range & Migration
Black-billed Nightingale-thrush
Eastern Bluebird
Eastern North America from southern Canada to Honduras and Nicaragua. Partially migratory.
保护状况
Least Concern
Black-billed Nightingale-thrush
Least Concern
Eastern Bluebird
How to Tell Them Apart
Black-billed Nightingale-thrush
Eastern Bluebird
羽毛
Males are vivid royal blue above with a rusty-red breast and white belly. Females are grey-blue with a paler rust breast.
喙
Short, thin, dark bill
About These Birds
Black-billed Nightingale-thrush
黑嘴夜鸫，黑色嘴、纯橄榄褐色、橙黄色腹面，分布于哥斯达黎加和巴拿马西部海拔1,500米以上高地。
Eastern Bluebird
北美幸福的象征。通过安装巢箱使种群得以恢复。冬季形成松散群体。