In other species: chicken , red-footed booby , Coscoroba swan , Bananaquit , helmeted guineafowl , gyrfalcon , Lesser snow goose , Arctic skua , , brown booby , zebra finch , ruff , rock pigeon , Eleonora's falcon , pomarine skua , king penguin

Possibly relevant human trait(s) and/or gene(s)s (MIM numbers): 266300 (trait) , 155555 (gene)

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal

Considered a defect: no

Key variant known: no

Molecular basis: Pointer and Mundy (2008) reported polymorphisms in the MC1R gene but could not discern a clear association between these polymorphisms and feather colour in swans,