Ferruginous Partridge vs Udzungwa Forest-partridge
Caloperdix oculeus compared with Xenoperdix udzungwensis
Side-by-Side Comparison
| Attribute | Ferruginous Partridge | Udzungwa Forest-partridge |
|---|---|---|
| Scientific Name | Caloperdix oculeus | Xenoperdix udzungwensis |
| Order | Galliformes | Galliformes |
| Family | Phasianidae | Phasianidae |
| Conservation Status | Near Threatened | Endangered |
| Length | — | — |
| Wingspan | 28.3 cm (11.1 in) | 28.8 cm (11.3 in) |
| Weight | 210.5 g (7.43 oz) | 207.25 g (7.31 oz) |
| Diet | Eats seeds, invertebrates, and small fruits on floor of Southeast Asian lowland and hill forests. … | Forages on floor of Udzungwa Tanzanian montane forest for seeds, invertebrates, and small fruits. Critically … |
| Clutch Size | 8-10 | 3 |
| 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.
Udzungwa Forest-partridge
Loud, clear whistled 'wheee-oo' calls from montane forest floor; haunting and infrequently heard. Alarm is a sharp explosive 'kek'; poorly known due to rarity in Udzungwa Mountains.
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.
Udzungwa Forest-partridge
Endemic to the Udzungwa Mountains of Tanzania. Found in montane forest at 1,000-2,000 m. Very poorly known; only two specimens collected.
Conservation Status
Ferruginous Partridge
Udzungwa Forest-partridge
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.
Udzungwa Forest-partridge
Brown above with fine black streaking and white shaft-streaks; red legs and bill; underparts paler buff-brown with dark-edged feathers creating scaled pattern; bare red facial skin around eye.
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.
Udzungwa Forest-partridge
A small partridge (~205 g) of family Phasianidae, with brown-streaked plumage and red legs. Endemic to the Eastern Arc Mountains of Tanzania, restricted to Udzungwa and Rubeho mountain forests above 1,300 m. Forages on the forest floor for seeds and invertebrates. Endangered; one of Africa's rarest birds, confined to a tiny forest area threatened by agricultural encroachment and logging.