The red-billed partridge (''Arborophila rubrirostris'') is a

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweig ...

species in the family Phasianidae. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

to the Basiran highland forest in Sumatra, Indonesia. It is the only member of the genus ''

Arborophila ''Arborophila'' is a bird genus in the family Phasianidae. The genus has the second most members within the Galliformes after ''Pternistis'', although ''Arborophila'' species vary very little in bodily proportions with different species varying ...

'' where the bill is completely red (others have either a yellow-tipped red bill or a black bill).

References

red-billed partridge Birds of Sumatra red-billed partridge Taxonomy articles created by Polbot {{Galliformes-stub