Ferruginous Partridge vs Swierstra's Spurfowl
Caloperdix oculeus compared with Pternistis swierstrai
Side-by-Side Comparison
| Attribute | Ferruginous Partridge | Swierstra's Spurfowl |
|---|---|---|
| Scientific Name | Caloperdix oculeus | Pternistis swierstrai |
| Order | Galliformes | Galliformes |
| Family | Phasianidae | Phasianidae |
| Conservation Status | Near Threatened | Vulnerable |
| Length | — | — |
| Wingspan | 28.3 cm (11.1 in) | 35.8 cm (14.1 in) |
| Weight | 210.5 g (7.43 oz) | 470.0 g (16.58 oz) |
| Diet | Eats seeds, invertebrates, and small fruits on floor of Southeast Asian lowland and hill forests. … | Omnivorous; eats seeds, invertebrates, and plant material in Angolan Afromontane forest and grassland. |
| Clutch Size | 8-10 | -- |
| 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.
Swierstra's Spurfowl
Loud, emphatic 'krak-KRAK' calls from Angolan montane forest; medium-sized spurfowl with slightly nasal quality. Alarm is rapid cackling cackle. Pairs call in duet at dawn from forest understorey.
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.
Swierstra's Spurfowl
Endemic to the highlands of central Angola (Huambo and Bié Plateaus); resident of montane grassland and open miombo woodland above 1,500 m.
Conservation Status
Ferruginous Partridge
Swierstra's Spurfowl
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.
Swierstra's Spurfowl
Brown above with pale buff streaks; white underparts with dark brown streaking; red bill; red legs; bare red skin around eye. Sexes similar; restricted to highlands of central Angola; rare …
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.
Swierstra's Spurfowl
A medium Phasianidae spurfowl (~470 g) restricted to montane forest and forest edge in the highlands of central Angola. Little known; detected mainly by vocalisations. Feeds on seeds, fruits, and invertebrates. Vulnerable from ongoing deforestation in Angolan highlands and limited range of under-surveyed montane forests.