The noble megapode (Megavitiornis altirostris), also known as the deep-billed megapode, is an extinct, flightless, giant stem-galliform bird that was endemic to Fiji. Originally thought to be a megapode, more recent morphological studies indicate a close relationship with the conspecific Sylviornis, in a clade outside of the Galliformes crown group. It is likely that it became extinct through overhunting shortly after the colonisation of the Fiji Islands by humans.