Sage Grouse vs Altai Snowcock
Centrocercus urophasianus comparé à Tetraogallus altaicus
Side-by-Side Comparison
| Attribut | Sage Grouse | Altai Snowcock |
|---|---|---|
| Nom scientifique | Centrocercus urophasianus | Tetraogallus altaicus |
| Ordre | Galliformes | Galliformes |
| Famille | Phasianidae | Phasianidae |
| Statut de conservation | Near Threatened | Least Concern |
| Longueur | — | — |
| Envergure | 61,2 cm (24.1 in) | 56,9 cm (22.4 in) |
| Poids | 2100,0 g (74.08 oz) | 2770,0 g (97.71 oz) |
| Régime alimentaire | Feeds almost entirely on sagebrush leaves and buds in winter; insects and forbs important in … | Feeds on alpine grasses, seeds, berries, and shoots; digs for roots and bulbs in Altai … |
| Taille de la couvée | 7-15 | 4-15 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Sage Grouse
Males produce extraordinary lek display: deep swishing 'swish-swish-coo-OO-ploop' using air sacs; low frequency, liquid, and otherworldly. Alarm is a cackling 'cac-cac'; females cluck softly.
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
Sage Grouse
Resident in sagebrush habitat of the western United States and southwestern Canada. Found in semi-arid plains with Artemisia. Vulnerable.
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.
Statut de conservation
Sage Grouse
Altai Snowcock
How to Tell Them Apart
Sage Grouse
Male has black belly, white breast, spiky pointed tail; yellow eye-combs; during display inflates yellow-green bare breast sacs exposing white feather ruff. Female mottled brown with dark belly patch.
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
Sage Grouse
The largest North American grouse (~2.1 kg), family Phasianidae, males with a spiked tail and inflatable yellow air sacs used in elaborate lek displays. Entirely dependent on sagebrush (Artemisia) ecosystems in the western United States and Canada for food and nesting. Feeds primarily on sagebrush leaves. Near Threatened; population severely declined due to widespread sagebrush habitat conversion.
Altai Snowcock
The largest snowcock (~2.77 kg), family Phasianidae, of alpine scree and subalpine meadows in the Altai and Tian Shan ranges of Central Asia. Heavily built, grey and white with rusty-brown markings. Feeds on roots, bulbs, and alpine plants. Forms small flocks outside breeding season. Least Concern.