The Old World cuckoos are brood parasites. Order: StrigiformesFamily: Strigidae  The typical owls are small to large solitary nocturnal birds of prey. They have large forward-facing eyes and ears, a hawk-like beak and a conspicuous circle of feathers around each eye called a facial disk. Order: CaprimulgiformesFamily: Caprimulgidae  Nightjars are medium-sized nocturnal birds that usually nest on the ground. They have long wings, short legs and very short bills. Most have small feet, of little use for walking, and long pointed wings. Their soft plumage is camouflaged to resemble bark or leaves. There are 86 species worldwide and 2 species which occur in Tajikistan. Order: CaprimulgiformesFamily: Apodidae  Swifts are small birds which spend the majority of their lives flying. These birds have very short legs and never settle voluntarily on the ground, perching instead only on vertical surfaces. Many swifts have long swept-back wings which resemble a crescent or boomerang. Order: CoraciiformesFamily: Alcedinidae  Kingfishers are medium-sized birds with large heads, long, pointed bills, short legs and stubby tails. There are 93 species worldwide and 1 species which occurs in Tajikistan. Order: CoraciiformesFamily: Meropidae  The bee-eaters are a group of near passerine birds in the family Meropidae. Most species are found in Africa but others occur in southern Europe, Madagascar, Australia and New Guinea. They are characterised by richly coloured plumage, slender bodies and usually elongated central tail feathers. All are colourful and have long downturned bills and pointed wings, which give them a swallow-like appearance when seen from afar. There are 26 species worldwide and 2 species which occur in Tajikistan. Order: CoraciiformesFamily: Coraciidae  Rollers resemble crows in size and build, but are more closely related to the kingfishers and bee-eaters. They share the colourful appearance of those groups with blues and browns predominating. The two inner front toes are connected, but the outer toe is not. There are 12 species worldwide and 1 species which occurs in Tajikistan. Order: BucerotiformesFamily: Upupidae  Hoopoes have black, white and orangey-pink colouring with a large erectile crest on their head.