▁the ▁red ▁eye , ▁which ▁in ▁the ▁English ▁F allow ▁is ▁a ▁clear ▁bright ▁red , ▁without ▁a ▁white ▁ir is ▁ring — a ▁beautiful ▁and ▁attract ive ▁feature . ▁ ▁The ▁eye ▁of ▁the ▁German ▁F allow ▁is ▁a ▁deep ▁ruby - red , ▁like ▁an ▁In o ' s ▁but ▁a ▁sh ade ▁dark er , ▁with ▁the ▁usual ▁white ▁ir is ▁ring ▁when ▁adult , ▁and ▁the ▁Scottish ▁F allow ▁has ▁a ▁p ink ▁ir is ▁ring . ▁ ▁On ▁h atch ing , ▁young ▁English ▁Fall ows ▁have ▁red ▁eyes ▁like ▁In os ▁but ▁young ▁German ▁F allow ▁ch icks ▁have ▁pl um - col oured ▁eyes ▁rather ▁like ▁C inn am on ▁ch icks . ▁ ▁The ▁Dark ▁mut ation ▁deep ens ▁the ▁body ▁colour ▁of ▁the ▁F allow , ▁but ▁the ▁difference ▁between ▁the ▁Light ▁Green , ▁Dark ▁Green ▁and ▁O live ▁F allow ▁is ▁far ▁less ▁than ▁that ▁between ▁the ▁normal ▁Light ▁Green , ▁Dark ▁Green ▁and ▁O live . ▁ ▁The ▁O live ▁F allow ▁is ▁" a ▁beautiful ▁rich ▁golden ▁orange ▁sh ade , ▁and ▁the ▁ch est ▁is ▁deep ▁yellow ▁o live — a ▁truly ▁lov ely ▁colour ing ", ▁says ▁Cy ril ▁Rog ers ▁in ▁The ▁Fall ows . ▁ ▁F allow ▁Gre ys ▁and ▁Grey - G reens ▁generally ▁have ▁dark er ▁wing ▁mark ings . ▁ ▁Op al ine ▁by ▁itself ▁light ens ▁the ▁body ▁colour ▁of ▁Fall ows , ▁and ▁in ▁combination ▁with ▁C inn am on ▁produces ▁a