Bornean Peacock-pheasant

Overview

The Bornean Peacock-pheasant is endemic to the lowland rainforests of Borneo, where it forages quietly on the shaded forest floor. It is one of the least-studied peacock-pheasants due to its reclusive habits and restricted, threatened habitat.

Both sexes carry the ocellated (eye-spotted) feather pattern typical of the genus, though males show larger, more vividly iridescent spots than females.

Feather Identification

• Body feathers: rich chestnut-brown ground color overall, finer and warmer toned than related peacock-pheasant species
• Ocelli (eyespots): rounded, iridescent blue-green to violet spots edged in black, arranged in rows across the back, wing coverts, and tail
• Tail feathers: broad and rounded rather than sharply pointed, each bearing one or two large paired ocelli near the tip
• Crest: short and inconspicuous compared to some relatives
• Facial skin: bare, reddish, contrasting with the dark feathering around the eye
• Distinguished from the Gray Peacock-pheasant by its warmer chestnut (rather than gray-brown) body tone and from the Malayan Peacock-pheasant by its smaller size and more restricted ocelli pattern

Plumage Details

Males display a chestnut-brown body liberally spangled with glossy blue-green ocelli, most concentrated on the wings and tail, which are fanned and tilted toward females during courtship to maximize iridescent flash. Females are duller and browner with smaller, less reflective spots and a shorter tail.

Juveniles resemble females, gradually acquiring larger and brighter ocelli as they mature. Molt replaces worn tail and wing feathers annually, refreshing the iridescent sheen that fades with wear and light exposure.

Habitat & Range

This species is restricted to lowland and hill dipterocarp rainforest across Borneo, favoring dense understory near streams. It is considered vulnerable due to ongoing deforestation and habitat fragmentation across its island range. Populations do not migrate, remaining resident within stable forest territories year-round.

Behavior & Field Notes

Bornean Peacock-pheasants are shy, solitary, or found in pairs, foraging on the forest floor for seeds, fallen fruit, and small invertebrates. Males perform a lateral courtship display, tilting the spread tail and wing toward the female to showcase the iridescent ocelli in filtered forest light.

Nests are simple ground scrapes hidden under dense vegetation. The voice is a soft, low-pitched call, rarely heard due to the bird's secretive nature. In the field, sightings are infrequent; feathers found on the forest floor showing chestnut ground color with paired blue-green eyespots are a strong clue to this species' presence.