Red-billed Partridge vs Ferruginous Partridge
Arborophila rubrirostris comparé à Caloperdix oculeus
Side-by-Side Comparison
| Attribut | Red-billed Partridge | Ferruginous Partridge |
|---|---|---|
| Nom scientifique | Arborophila rubrirostris | Caloperdix oculeus |
| Ordre | Galliformes | Galliformes |
| Famille | Phasianidae | Phasianidae |
| Statut de conservation | Least Concern | Near Threatened |
| Longueur | — | — |
| Envergure | 26,2 cm (10.3 in) | 28,3 cm (11.1 in) |
| Poids | 226,0 g (7.97 oz) | 210,5 g (7.43 oz) |
| Régime alimentaire | Eats seeds, invertebrates, and small fruits on floor of Bornean montane forests. Little-studied; diet inferred … | Eats seeds, invertebrates, and small fruits on floor of Southeast Asian lowland and hill forests. … |
| Taille de la couvée | -- | 8-10 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Red-billed Partridge
Clear, high-pitched 'wheee-oop' whistle; slurred downward at end. Borneo endemic calling from montane understorey. Contact calls soft low clucks; alarm a sharp explosive 'pit' note.
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.
Geographic Range & Migration
Red-billed Partridge
Resident in the montane forests of Sumatra and Borneo at 600-2,000 m. Found in primary hill and montane forest.
Ferruginous Partridge
Resident in lowland rainforest of the Thai-Malay Peninsula, Sumatra, and Borneo. Found in flat or gently sloping lowland forest.
Statut de conservation
Red-billed Partridge
Ferruginous Partridge
How to Tell Them Apart
Red-billed Partridge
Brown above streaked darker; throat and face white with fine dark scaling; breast grey; flanks grey with white streaks; distinctive bright red bill and red eye-ring; no rufous breast patches.
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.
About These Birds
Red-billed Partridge
A small partridge (~225 g) of family Phasianidae, distinguished by its bright red bill on dark plumage. Endemic to montane forests of Sumatra at 700–2,000 m elevation. Inhabits the forest floor and dense undergrowth of subtropical highland forest. Forages for seeds, berries, and invertebrates. Least Concern; restricted to Sumatran mountains but currently stable with sufficient forest cover remaining.
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.