▁Clear body ▁variety . ▁ ▁Over ▁the ▁years ▁many ▁mut ations ▁have ▁been ▁reported ▁which ▁produce ▁a ▁( rel atively ) ▁clear ▁yellow ▁or ▁white ▁body ▁with ▁normal ▁black ▁or ▁dark ▁wing ▁mark ings , ▁approxim ating ▁to ▁the ▁beautiful ▁painting ▁of ▁a ▁( h yp oth et ical ) ▁" la ced ▁Y ellow " ▁by ▁R ▁A ▁V ow les ▁shown ▁in ▁Dr ▁M ▁D ▁S ▁Arm our ' s ▁book , ▁" Ex hib ition ▁Bud ger ig ars ". ▁ ▁In ▁an ▁article ▁published ▁in ▁C age ▁and ▁A vi ary ▁Bird s ▁Dr ▁T ▁Daniel s ▁summar ised ▁those ▁that ▁were ▁known ▁in ▁ 1 9 8 1 . ▁ ▁Many ▁of ▁these ▁failed ▁to ▁become ▁established , ▁and ▁others , ▁reported ▁separately , ▁may ▁have ▁been ▁the ▁same ▁mut ation ▁which ▁appeared ▁in ▁different ▁parts ▁of ▁the ▁world . ▁ ▁The ▁Sex - link ed ▁Clear body ▁was ▁one ▁which ▁was ▁established ▁successfully ▁in ▁the ▁US . ▁ ▁App earance ▁ ▁In ▁the ▁green ▁series ▁the ▁Sex - link ed ▁( Tex as ) ▁Clear body ▁has ▁a ▁yellow ▁body ▁with ▁a ▁pale ▁green ish ▁cast , ▁and ▁white ▁in ▁the ▁blue ▁series ▁with ▁a ▁pale ▁bl u ish ▁cast . ▁ ▁The ▁cast ▁is ▁pal est ▁on ▁the ▁breast , ▁increasing ▁towards ▁the ▁vent ▁and ▁r ump . ▁ ▁The ▁variety ▁has ▁normal ▁wing ▁mark ing ▁in ▁grey - black , ▁off - white ▁to ▁grey ▁fl ights , ▁a ▁tail ▁rather ▁l ighter ▁than ▁usual