Arborophila orientalis

The details are unknown.

It is distributed in the Pacific Islands (including Taiwan Province of China, Dongsha Islands, Xisha Islands, Zhongsha Islands, Nansha Islands, and the Philippines, Brunei, Malaysia, Singapore, Indonesia's Sumatra, Java Island, and Papua New Guinea).

Arborophila orientalis, Gray-breasted Hill Partridge, good at concealing. They often live in pairs or groups, consisting of 4-12 individuals. Most of the activity is on the forest floor, and at night, it perches on branches. Every morning and evening, often issued a series of calls, repeated calls, good at running and walking on the ground, generally rarely take off.

The partridge mainly feeds on plant seeds, berries, shoots, shoots, young leaves, etc. It also eats earthworms, insects and other animal foods. They often scrape their food on the ground with their feet.

The breeding season is from April to June. The nest is in evergreen broad-leaved forest, bamboo forest and forest margin scrub in the low mountain hills and the plain area at the foot of the mountain. The use of natural pits on the ground or by the female bird to dig a small pit on the ground, the nest is mostly placed in the ground pit, with dry grass leaves and leaves, surrounded by lush shrubs or tall grass plants covered, concealed better and not easy to find. Each clutch lays 6-8 eggs and hatches for 24 days. The brooding is mainly done by the female, and the male is responsible for the vigilance. During the incubation period, the female bird is very fond of the nest, and sometimes people will not fly until they get close to the nest. Young birds have sex early and can follow their parents soon after hatching.

Listed on the International Union for Conservation of Nature (IUCN) 2016 Red List of Threatened Species ver 3.1: Vulnerable (VU).

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