Pe ople ▁from ▁Ed mont on , ▁London ▁Category : Rad ical ism ▁( histor ical ) <0x0A> </s> ▁The ▁name ▁" pur ple ▁roll er " ▁can ▁also ▁refer ▁to ▁the ▁azure ▁doll ar bird ▁( E ur yst om us ▁azure us ) ▁of ▁Indones ia . ▁ ▁The ▁pur ple ▁roll er ▁( C ora cias ▁na e vi us ), ▁or ▁r uf ous - c rown ed ▁roll er , ▁is ▁w ides p read ▁in ▁sub - S ah aran ▁Africa . ▁Comp ared ▁with ▁other ▁roll ers ▁its ▁colours ▁are ▁rather ▁d ull ▁and ▁its ▁voice ▁rather ▁har sh ▁and ▁gr ating . ▁ ▁Tax onomy ▁and ▁system at ics ▁ ▁Sub species ▁Two ▁sub species ▁are ▁recognized : ▁▁ ▁Lil ac - th ro ated ▁roll er ▁( C . ▁n . ▁na e vi us ) ▁- ▁Da ud in , ▁ 1 8 0 0 : ▁The ▁common ▁name ▁for ▁this ▁sub species ▁is ▁also ▁used ▁as ▁an ▁alternate ▁name ▁for ▁the ▁l il ac - bre asted ▁roll er . ▁Found ▁from ▁Sen eg al ▁and ▁G amb ia ▁to ▁Som alia ▁and ▁northern ▁T anz ania ▁ ▁C . ▁n . ▁mos amb icus ▁- ▁D ress er , ▁ 1 8 9 0 : ▁Origin ally ▁described ▁as ▁a ▁separate ▁species . ▁Found ▁from ▁Ang ola ▁and ▁southern ▁Democratic ▁Republic ▁of ▁Congo ▁to ▁Nam ib ia ▁northern ▁South ▁Africa ▁ ▁Description ▁The ▁pur ple ▁roll er ▁is ▁the ▁largest ▁of