Ferruginous Partridge vs Annamite Crested Argus
Caloperdix oculeus verglichen mit Rheinardia ocellata
Side-by-Side Comparison
| Merkmal | Ferruginous Partridge | Annamite Crested Argus |
|---|---|---|
| Wissenschaftlicher Name | Caloperdix oculeus | Rheinardia ocellata |
| Ordnung | Galliformes | Galliformes |
| Familie | Phasianidae | Phasianidae |
| Erhaltungsstatus | Near Threatened | Critically Endangered |
| Länge | — | — |
| Flügelspannweite | 28,3 cm (11.1 in) | 67,1 cm (26.4 in) |
| Gewicht | 210,5 g (7.43 oz) | 1500,0 g (52.91 oz) |
| Ernährung | Eats seeds, invertebrates, and small fruits on floor of Southeast Asian lowland and hill forests. … | Forages on leaf litter for fallen fruits, seeds, invertebrates, and small animals; uses feet to … |
| Gelegegröße | 8-10 | 2 |
| 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.
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.
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.
Annamite Crested Argus
Resident of dense montane forest in the Annamite Mountains of Laos and Vietnam, above 400 m; extremely secretive.
Erhaltungsstatus
Ferruginous Partridge
Annamite Crested Argus
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.
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.
About These Birds
Ferruginous Partridge
A small partridge (~210 g) of family Phasianidae, with rich ferruginous (rust-red) plumage and spotted black-and-white markings. Inhabits lowland and foothill rainforests in Malaysia, Sumatra, and Borneo. Secretive, foraging on the forest floor for seeds and invertebrates. Near Threatened; associated with primary and tall secondary forest, declining with ongoing logging and land conversion.
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.