▁familiar ▁domestic ▁ch icken , ▁the ▁red ▁j ung lef ow l ▁has ▁a ▁much ▁smaller ▁body ▁mass ▁( around ▁ 2 ¼ ▁l bs ▁( 1 ▁kg ) ▁in ▁females ▁and ▁ 3 ¼ ▁l bs ▁( 1 . 5 kg ) ▁in ▁males ) ▁and ▁is ▁br ighter ▁in ▁color ation . ▁Jung lef ow l ▁are ▁also ▁behaviour ally ▁different ▁from ▁domestic ▁ch ick ens , ▁being ▁naturally ▁very ▁sh y ▁of ▁humans ▁compared ▁to ▁the ▁much ▁t amer ▁domestic ated ▁sub species . ▁ ▁Sex ual ▁dim orphism ▁Male ▁j ung lef ow l ▁are ▁significantly ▁larger ▁than ▁females ▁and ▁have ▁bright ly ▁col oured ▁decor ative ▁fe athers . ▁The ▁male ' s ▁tail ▁is ▁composed ▁of ▁long , ▁arch ing ▁fe athers ▁that ▁initially ▁look ▁black , ▁but ▁sh immer ▁with ▁blue , ▁pur ple , ▁and ▁green ▁in ▁direct ▁light . ▁He ▁also ▁has ▁long , ▁golden ▁hack le ▁fe athers ▁on ▁his ▁neck ▁and ▁on ▁his ▁back . ▁The ▁female ' s ▁pl um age ▁is ▁typical ▁of ▁this ▁family ▁of ▁birds ▁in ▁being ▁crypt ic ▁and ▁adapted ▁for ▁cam ou fl age . ▁She ▁alone ▁looks ▁after ▁the ▁eggs ▁and ▁ch icks . ▁She ▁also ▁has ▁a ▁very ▁small ▁comb ▁and ▁w att les ▁( f les hy ▁orn aments ▁on ▁the ▁head ▁that ▁signal ▁good ▁health ▁to ▁riv als ▁and ▁potential ▁m ates ) ▁compared ▁to ▁the ▁males . ▁ ▁During ▁their ▁m ating ▁season , ▁the ▁male ▁birds ▁announ ce ▁their ▁presence