Ferruginous Partridge vs Willow Grouse
Caloperdix oculeus 对比 Lagopus lagopus
Side-by-Side Comparison
| 属性 | Ferruginous Partridge | Willow Grouse |
|---|---|---|
| 学名 | Caloperdix oculeus | Lagopus lagopus |
| 目 | Galliformes | Galliformes |
| 科 | Phasianidae | Phasianidae |
| 保护状况 | Near Threatened | Least Concern |
| 体长 | — | — |
| 翼展 | 28.3 cm (11.1 in) | 39.1 cm (15.4 in) |
| 体重 | 210.5 g (7.43 oz) | 595.4166666666666 g (21.00 oz) |
| 食性 | Eats seeds, invertebrates, and small fruits on floor of Southeast Asian lowland and hill forests. … | Eats willow and birch buds, catkins, and shoots in winter; berries, seeds, flowers, and insects … |
| 产卵数 | 8-10 | 3-14 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Ferruginous Partridge
Sharp, staccato 'krik-krik-krik' calls from lowland rainforest; often given in duet. Alarm is a loud, rapid chattering rattle; contact notes between pairs soft and clucking.
Willow Grouse
Loud, laughing 'kow-kow-kow-karrr' cackle from males on tundra; raucous and carrying. Alarm is a sharp repetitive 'kek'. Female gives low clucks near nest; male produces barking territorial call.
Geographic Range & Migration
Ferruginous Partridge
Resident in lowland rainforest of the Thai-Malay Peninsula, Sumatra, and Borneo. Found in flat or gently sloping lowland forest.
Willow Grouse
Circumpolar breeder in Arctic and boreal tundra of North America, Europe, and Asia. Winters south to temperate grasslands and shrubland.
保护状况
Ferruginous Partridge
Willow Grouse
How to Tell Them Apart
Ferruginous Partridge
Rich ferruginous (deep rusty-orange) overall; upperparts black-and-rufous barred; flanks black boldly spotted white; bare red facial skin; underparts rufous-orange; one of the most vividly coloured Southeast Asian partridges.
Willow Grouse
Winter: entirely white except black tail; summer male: rufous-chestnut head and breast, white belly and wings; red eye-comb; feathered white feet year-round. Seasonal plumage change is pronounced.
About These Birds
Ferruginous Partridge
锈红山鹑，约210克，锈红色有黑白斑点，分布于马来西亚、苏门答腊和婆罗洲，近危。
Willow Grouse
柳雷鸟（约500克）是一种松鸡科鸟类，冬季换上白色羽毛以适应积雪生境。广布于北极和亚北极苔原、北方林地和英国沼泽。以柳树、桦树嫩枝和浆果为食。无危；种群数量通常随旅鼠数量周期性波动，某些地区因气候变化而受到影响。