Ferruginous Partridge vs Sharp-tailed Grouse
Caloperdix oculeus compared with Tympanuchus phasianellus
Side-by-Side Comparison
| Attribute | Ferruginous Partridge | Sharp-tailed Grouse |
|---|---|---|
| Scientific Name | Caloperdix oculeus | Tympanuchus phasianellus |
| Order | Galliformes | Galliformes |
| Family | Phasianidae | Phasianidae |
| Conservation Status | Near Threatened | Least Concern |
| Length | — | — |
| Wingspan | 28.3 cm (11.1 in) | 40.1 cm (15.8 in) |
| Weight | 210.5 g (7.43 oz) | 839.1666666666666 g (29.60 oz) |
| Diet | Eats seeds, invertebrates, and small fruits on floor of Southeast Asian lowland and hill forests. … | Eats grass seeds, buds, berries, and invertebrates in North American grasslands, boreal forest edges, and … |
| Clutch Size | 8-10 | 5-17 |
| Population Trend | — | — |
Habitat Comparison
Shared Habitats
Ferruginous Partridge only
None
Sharp-tailed Grouse only
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.
Sharp-tailed Grouse
Males on lek produce cooing 'coo-coo-coo' calls and rapid foot-stomping; tail vibrated rapidly creating buzzing sound. Alarm is a sharp cackle. Display calls carry across open grassland at dawn.
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.
Sharp-tailed Grouse
Resident across boreal and sub-Arctic North America from Alaska to Quebec. Winters south to the Great Plains and central United States.
Conservation Status
Ferruginous Partridge
Sharp-tailed Grouse
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.
Sharp-tailed Grouse
Mottled buff, brown, and white above; underparts white with brown V-shaped marks; pointed central tail feathers white; yellow eye-comb; males display purple neck sacs. Pointed tail is key identification feature.
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.
Sharp-tailed Grouse
A medium-sized grouse (~840 g) of family Phasianidae, with spotted brown plumage and a distinctive pointed tail. Inhabits grasslands, shrubby prairies, and forest edges across northern North America. Males gather at communal leks to perform elaborate foot-stamping dances. Feeds on berries, seeds, and insects. Least Concern; one of North America's most widespread prairie grouse species.