Baird's Junco vs American Tree Sparrow
Junco bairdi 比較対象 Passerella arborea
Side-by-Side Comparison
| 属性 | Baird's Junco | American Tree Sparrow |
|---|---|---|
| 学名 | Junco bairdi | Passerella arborea |
| 目 | Passeriformes | Passeriformes |
| 科 | Passerellidae | Passerellidae |
| 保全状況 | Near Threatened | Least Concern |
| 体長 | — | — |
| 翼開長 | 15.5 cm (6.1 in) | 14.4 cm (5.7 in) |
| 体重 | 17.85 g (0.63 oz) | 19.0 g (0.67 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 2 | 4-6 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Near Threatened
Baird's Junco
Least Concern
American Tree Sparrow
About These Birds
Baird's Junco
The Baird's Junco is a Near Threatened junco endemic to the mountains of the Sierra de la Laguna in Baja California Sur, Mexico, weighing about 17.85g with a wingspan of 15.5cm. It inhabits pine-oak forest at high elevations and feeds on seeds and insects on or near the ground. Its very restricted range makes it vulnerable to climate change.
American Tree Sparrow
The American Tree Sparrow is a compact passerellid weighing 19 g with a 14.4 cm wingspan, breeding in shrubby Arctic tundra and wintering in open fields and weedy areas across North America. It is identified by its rufous cap and distinctive central breast spot.