Ferruginous Partridge vs Sooty Grouse
Caloperdix oculeus comparado com Dendragapus fuliginosus
Side-by-Side Comparison
| Atributo | Ferruginous Partridge | Sooty Grouse |
|---|---|---|
| Nome científico | Caloperdix oculeus | Dendragapus fuliginosus |
| Ordem | Galliformes | Galliformes |
| Família | Phasianidae | Phasianidae |
| Estado de conservação | Near Threatened | Least Concern |
| Comprimento | — | — |
| Envergadura | 28,3 cm (11.1 in) | 44,6 cm (17.6 in) |
| Peso | 210,5 g (7.43 oz) | 1016,25 g (35.85 oz) |
| Dieta | Eats seeds, invertebrates, and small fruits on floor of Southeast Asian lowland and hill forests. … | Feeds on conifer needles, especially Douglas-fir, in winter; berries, leaves, seeds, and insects in summer. |
| Tamanho da postura | 8-10 | 6-12 |
| 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.
Sooty Grouse
Deep, booming 'hoot-hoot-hoot-hoot-hoot' from treetop perch; inflated cervical sacs amplify resonance. Similar to Dusky Grouse but with subtle tonal differences. Alarm is rapid sharp clucking.
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.
Sooty Grouse
Resident along the Pacific coast and Cascade-Sierra ranges from Alaska south to northern California. Found in coastal coniferous forest.
Estado de conservação
Ferruginous Partridge
Sooty 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.
Sooty Grouse
Male is dark sooty-grey; tail grey with broad pale grey terminal band; yellow eye-comb; bare pink-purple neck sac visible during display. Female mottled dark brown; overall darker than Dusky Grouse.
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.
Sooty Grouse
A large grouse (~1 kg) of family Phasianidae, males uniformly dark sooty-grey with yellow-orange eyecomb. Inhabits coastal and Pacific mountain forests from Alaska to California. Feeds on conifer needles, especially fir and hemlock, in winter; berries and invertebrates in summer. Migrates upslope in winter, opposite to most birds. Least Concern; common along the Pacific Coast mountain ranges.