Tan-breasted Partridge vs Ferruginous Partridge
Arborophila rolli compared with Caloperdix oculeus
Side-by-Side Comparison
| Attribute | Tan-breasted Partridge | Ferruginous Partridge |
|---|---|---|
| Scientific Name | Arborophila rolli | Caloperdix oculeus |
| Order | Galliformes | Galliformes |
| Family | Phasianidae | Phasianidae |
| Conservation Status | Least Concern | Near Threatened |
| Length | — | — |
| Wingspan | 28.1 cm (11.1 in) | 28.3 cm (11.1 in) |
| Weight | 336.0 g (11.85 oz) | 210.5 g (7.43 oz) |
| Diet | Forages on floor of northern Sumatran montane forests for seeds, invertebrates, and small fruits. Little-studied … | Eats seeds, invertebrates, and small fruits on floor of Southeast Asian lowland and hill forests. … |
| Clutch Size | -- | 8-10 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Tan-breasted Partridge
Clear, ringing 'wii-OO' whistle heard from Sumatra's foothills; second note drawn out. Poorly known; alarm a short sharp 'kek'. Covey contact maintained by soft, quiet clucks.
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
Tan-breasted Partridge
Endemic to northern Sumatra in Aceh and North Sumatra provinces. Found in lowland and foothill forest below 1,000 m.
Ferruginous Partridge
Resident in lowland rainforest of the Thai-Malay Peninsula, Sumatra, and Borneo. Found in flat or gently sloping lowland forest.
Conservation Status
Tan-breasted Partridge
Ferruginous Partridge
How to Tell Them Apart
Tan-breasted Partridge
Brown above; breast uniform tan-buff without chestnut or grey; throat whitish; flanks olive-brown streaked pale; bare reddish eye-ring; uniform tan breast is diagnostic against grey-breasted congeners.
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
Tan-breasted Partridge
A medium-sized partridge (~335 g) of family Phasianidae, with plain tan-brown breast and muted brown upperparts. Endemic to the Natuna Islands of Indonesia. Inhabits tropical forest. Forages on the forest floor for seeds and invertebrates. Least Concern; while restricted to small islands, remains stable; its insular endemism makes it vulnerable to future habitat clearance or introduced predators.
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.