The Long-billed Partridge (Rhizothera longirostris) is a species of bird

Bird

Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...

 in the Phasianidae

Phasianidae

The Phasianidae is a family of birds which consists of the pheasants and partridges, including the junglefowl , Old World Quail, francolins, monals and peafowl. The family is a large one, and is occasionally broken up into two subfamilies, the Phasianinae, and the Perdicinae...

 family.

Distribution and habitat

It is found in the Malay Peninsula

Malay Peninsula

The Malay Peninsula or Thai-Malay Peninsula is a peninsula in Southeast Asia. The land mass runs approximately north-south and, at its terminus, is the southern-most point of the Asian mainland...

, Sumatra

Sumatra

Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

 and Borneo

Borneo

Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....

. Its natural habitat

Habitat

* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...

s are subtropical or tropical dry forest

Forest

A forest, also referred to as a wood or the woods, is an area with a high density of trees. As with cities, depending where you are in the world, what is considered a forest may vary significantly in size and have various classification according to how and what of the forest is composed...

s, subtropical or tropical moist lowland forests, and subtropical or tropical moist montane

Montane

In biogeography, montane is the highland area located below the subalpine zone. Montane regions generally have cooler temperatures and often have higher rainfall than the adjacent lowland regions, and are frequently home to distinct communities of plants and animals.The term "montane" means "of the...

 forests. It is threatened by habitat loss. There are two distinct subspecies; the nominate race R. l. longirostris is relatively widespread, while R. l. dulitensis, sometimes considered to be a full species known as the Dulit Partridge

Dulit Partridge

The Hose's Partridge , also known as Dulit Partridge, has been considered a distinctive subspecies of the Long-billed Partridge, a bird in the Phasianidae, or pheasant, family. It is endemic to Borneo, where it appears to be separated altitudinally from the nominate subspecies, and is often...

or Hose's Partridge (R. dulitensis), has a very restricted range in the mountains of central Borneo.