white ▁pl um age , ▁and ▁assumed ▁the ▁bird ▁seen ▁by ▁T aff oret ▁was ▁a ▁sort ▁of ▁ch ough . ▁In ▁ 1 9 3 7 , ▁he ▁named ▁it ▁Test ud oph aga ▁b icol or , ▁with ▁Test ud oph aga ▁meaning ▁" t ort o ise ▁e ater ", ▁and ▁co ined ▁the ▁common ▁name ▁" bi - col oured ▁ch ough ". ▁H ach is uka ' s ▁assumptions ▁are ▁dis reg arded ▁today , ▁and ▁modern ▁orn ith olog ists ▁find ▁T aff oret ' s ▁bird ▁to ▁be ▁identical ▁to ▁the ▁one ▁described ▁from ▁sub f oss il ▁remains . ▁ ▁In ▁ 1 9 8 7 , ▁the ▁British ▁orn ith ologist ▁Graham ▁S . ▁Cow les ▁prepared ▁a ▁manuscript ▁that ▁described ▁a ▁new ▁species ▁of ▁Old ▁World ▁b abb ler , ▁Rod rig uit es ▁micro car ina , ▁based ▁on ▁an ▁incomplete ▁stern um ▁found ▁in ▁a ▁cave ▁on ▁Rod rig ues . ▁ ▁In ▁ 1 9 8 9 , ▁the ▁name ▁was ▁mistaken ly ▁published ▁before ▁the ▁description , ▁making ▁it ▁a ▁nom en ▁n ud um . ▁Later ▁exam ination ▁of ▁the ▁stern um ▁by ▁H ume ▁showed ▁that ▁Rod rig uit es ▁micro car ina ▁was ▁identical ▁to ▁the ▁Rod rig ues ▁star ling . ▁ ▁E volution ▁In ▁ 1 9 4 3 , ▁the ▁American ▁orn ith ologist ▁Dean ▁Am ad on ▁suggested ▁that ▁St urn us - like ▁species ▁could ▁have ▁arrived ▁in ▁Africa , ▁and