Can someone please tell me the difference between these two birds. The Eurasion Collared-dove (Streptopelia Decaocto) (aka Ringed Turtle-dove) and the African Collared-dove (Streptopelia Risoria) (aka Barbary Dove) look alike to me. They have different scientific names so must be two different birds. One is from Asia and one from Africa. What is the difference? What would I look for to ID one of these birds? Thank you.