Passage: Streptopelia is a genus of birds in the dove family. The name Streptopelia is from Ancient Greek streptos, "collar" and peleia, "dove". These are mainly slim, small to medium-sized species. The upperparts tend to be pale brown, and the underparts are often a shade of pink. Many have a characteristic black-and-white patch on the neck, and monotonous cooing songs.

Question: How big are these birds?
small to medium-sized