Chestnut-bellied Partridge vs Ferruginous Partridge
Arborophila javanica compared with Caloperdix oculeus
Side-by-Side Comparison
| Attribute | Chestnut-bellied Partridge | Ferruginous Partridge |
|---|---|---|
| Scientific Name | Arborophila javanica | Caloperdix oculeus |
| Order | Galliformes | Galliformes |
| Family | Phasianidae | Phasianidae |
| Conservation Status | Least Concern | Near Threatened |
| Length | — | — |
| Wingspan | 28.0 cm (11.0 in) | 28.3 cm (11.1 in) |
| Weight | 271.5 g (9.58 oz) | 210.5 g (7.43 oz) |
| Diet | Forages on Javan and Balinese montane forest floor for seeds, invertebrates, and small fruits. Scratches … | Eats seeds, invertebrates, and small fruits on floor of Southeast Asian lowland and hill forests. … |
| Clutch Size | 4 | 8-10 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Chestnut-bellied Partridge
Penetrating, flute-like 'wee-WU' whistle in Javan mountain forest; male calls at dawn from understorey. Alarm is rapid staccato 'kek-kek'. Pairs duet with slight overlapping of notes.
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
Chestnut-bellied Partridge
Endemic to Java and Bali at 300-2,500 m. Found in dense montane forest and forest edges on volcanic mountains.
Ferruginous Partridge
Resident in lowland rainforest of the Thai-Malay Peninsula, Sumatra, and Borneo. Found in flat or gently sloping lowland forest.
Conservation Status
Chestnut-bellied Partridge
Ferruginous Partridge
How to Tell Them Apart
Chestnut-bellied Partridge
Brown above; throat white bordered black; breast grey; belly and flanks rich chestnut contrasting with grey breast; bare red eye-ring; chestnut belly contrasting with pale breast is the key marking.
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
Chestnut-bellied Partridge
A medium-sized partridge (~270 g) of family Phasianidae, with a rich chestnut belly and boldly patterned head. Endemic to the montane forests of Java at 800–3,000 m elevation. Inhabits primary and secondary highland forest. Forages on the forest floor for seeds, berries, and invertebrates. Least Concern; well represented in Java's mountain national parks despite the island's high human population density.
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.