Streptopelia capicola
The cape turtle dove (otherwise known as the ring-necked dove) is an abundant species with a black, half-moom collar on its nape. Its three-syllabled crooning is a very familiar sound of the southern African bush.
This particular dove is both widespread and abundant in southern Africa and can be seen just about anywhere. My favourite place for observing this species is the Kgalagadi Transfrontier Park, where they arrive in their hordes to drink in the mornings and afternoons, and are also the main attraction for predatory birds.