Annamite Crested Argus vs Crested Partridge
Rheinardia ocellata compared with Rollulus rouloul
Side-by-Side Comparison
| Attribute | Annamite Crested Argus | Crested Partridge |
|---|---|---|
| Scientific Name | Rheinardia ocellata | Rollulus rouloul |
| Order | Galliformes | Galliformes |
| Family | Phasianidae | Phasianidae |
| Conservation Status | Critically Endangered | Vulnerable |
| Length | — | — |
| Wingspan | 67.1 cm (26.4 in) | 27.2 cm (10.7 in) |
| Weight | 1500.0 g (52.91 oz) | 250.5 g (8.84 oz) |
| Diet | Forages on leaf litter for fallen fruits, seeds, invertebrates, and small animals; uses feet to … | Forages on floor of Southeast Asian lowland rainforests for seeds, fallen fruits, and invertebrates. Scratches … |
| Clutch Size | 2 | 4-6 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Annamite Crested Argus
Loud, mournful 'kow-WEE' whistling cries from Vietnam rainforest floor; haunting and fox-like. Males call from log or elevated perch. Alarm is explosive cackle. One of world's rarest galliform voices.
Crested Partridge
High-pitched, thin whistled 'seee' repeated persistently; metallic and insect-like. Males call from forest floor, rarely seen. Alarm is an explosive low grunt followed by rapid wing beats.
Geographic Range & Migration
Annamite Crested Argus
Resident of dense montane forest in the Annamite Mountains of Laos and Vietnam, above 400 m; extremely secretive.
Crested Partridge
Resident in lowland and foothill rainforest of Myanmar, Thailand, Malaysia, Sumatra, and Borneo. Found below 1,500 m.
Conservation Status
Annamite Crested Argus
Crested Partridge
How to Tell Them Apart
Annamite Crested Argus
Brown and buff intricately patterned with ocelli; long broad graduated tail with dark ocellated spots; white-streaked dark crest; bare blue facial skin. Sexes similar but male with much longer tail.
Crested Partridge
Male is dark glossy green-black with vivid red-crimson erectile crest; red orbital skin; chestnut wings. Female is entirely bright emerald green with brown wings, red legs, and grey head; among …
About These Birds
Annamite Crested Argus
One of the most spectacular Phasianidae birds (~1.5 kg), endemic to evergreen forests of Vietnam and Laos. Males possess extraordinary elongated brown-spotted tail feathers. Performs a solitary lekking display on cleared forest arenas. Feeds on fallen fruits and invertebrates. Critically Endangered from deforestation.
Crested Partridge
A small partridge (~250 g) of family Phasianidae, males with vivid crimson crest and iridescent green plumage. Found in lowland tropical rainforests of Southeast Asia including Thailand, Malaysia, Sumatra, and Borneo. Forages on the forest floor for fallen seeds, fruits, and invertebrates. Vulnerable; dependent on primary lowland forest, heavily impacted by deforestation and palm oil expansion.