Black-billed Capercaillie vs Altai Snowcock
Tetrao urogalloides 比較対象 Tetraogallus altaicus
Side-by-Side Comparison
| 属性 | Black-billed Capercaillie | Altai Snowcock |
|---|---|---|
| 学名 | Tetrao urogalloides | Tetraogallus altaicus |
| 目 | Galliformes | Galliformes |
| 科 | Phasianidae | Phasianidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 68.2 cm (26.9 in) | 56.9 cm (22.4 in) |
| 体重 | 2957.5 g (104.32 oz) | 2770.0 g (97.71 oz) |
| 食性 | Subsists mainly on larch needles in winter; takes berries, buds, and insects during the warmer … | Feeds on alpine grasses, seeds, berries, and shoots; digs for roots and bulbs in Altai … |
| 一腹卵数 | 5-10 | 4-15 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Black-billed Capercaillie
Similar to Western Capercaillie but generally higher-pitched; ticking phase faster, grinding phase shorter. Siberian larch forest species. Alarm is a loud bark; females give soft clucking brood calls.
Altai Snowcock
Loud, ringing whistled 'whi-WHEEE' echoing across Altai alpine slopes; deeper than Tibetan Snowcock due to larger size. Alarm is rapid barking. Calls at dawn from rocky ridgelines.
Geographic Range & Migration
Black-billed Capercaillie
Resident of coniferous taiga in eastern Russia from the Lena River to the Pacific coast, Kamchatka, and northeastern China.
Altai Snowcock
Resident of alpine rocky slopes and grassy hillsides in the Altai and Sayan mountains of Russia, Kazakhstan, and western Mongolia, at 2,000–4,000 m.
保全状況
Black-billed Capercaillie
Altai Snowcock
How to Tell Them Apart
Black-billed Capercaillie
Male uniformly glossy blue-black with slight greenish sheen on breast; smaller white wing spots than Western Capercaillie; black bill. Female barred rufous-buff and dark brown, paler below than congener.
Altai Snowcock
Largest snowcock; grey-brown upperparts with buff streaks; white underparts with grey breast; rufous necklace streaks on lower neck; white outer tail in flight; whitish face with dark ear patch. Sexes …
About These Birds
Black-billed Capercaillie
カラフトライチョウはシベリアと極東アジアの針葉樹林に生息する大型のライチョウの仲間です。雄の求愛ディスプレイは特徴的です。
Altai Snowcock
アルタイセッケイはアルタイ山脈の高山地帯に生息する大型のキジ科の鳥です。険しい岩場の斜面を好み、植物の種子や葉を食べます。