Females are similar but smaller, duller, and crestless. They are compatible with crestless firebacks and eared pheasants but not with junglefowl or francolin. Some antiquated texts also refer to this species as the crestless hawk-eagle. A crestless version was produced in small numbers as well. Male crestless firebacks are about in length and females slightly smaller. Also, Salvadori's pheasant occurs at higher altitudes in Sumatra than the crestless fireback. The crestless fireback is a retiring bird and has been little studied. The crestless fireback ("Lophura erythrophthalma") is a species of bird in the family Phasianidae. Traditionally, the "crestless" branch of the family Hadrosauridae had been named Hadrosaurinae. The crestless curassow ("Mitu tomentosum") is a species of bird in the family Cracidae.