The rollers are an Old World family of near passerine birds, related to the kingfishers and bee-eaters. The group gets its name from the aerial acrobatics some of these birds perform during courtship or territorial flights. Description Rollers resemble crows in size and build, ranging from 25 to 27 centimetres in length. They share the colourful appearance of those groups, blues and browns predominating. The two inner front toes are connected, but not the outer one. They're insect eaters, wit… (More on Roller)