The guans and curassows live in trees, but the smaller chachalacas are found in more open scrubby habitats. They are generally dull-plumaged, but the curassows and some guans have colorful facial ornaments. Colombia has the largest number of cracids of any country; twenty-six have been recorded there. Order: GalliformesFamily: Odontophoridae  The New World quails are small, plump terrestrial birds only distantly related to the quails of the Old World, but named for their similar appearance and habits. Ten species have been recorded in Colombia. Order: PhoenicopteriformesFamily: Phoenicopteridae  Flamingos are gregarious wading birds, usually tall, found in both the Western and Eastern Hemispheres. Flamingos filter-feed on shellfish and algae. Their oddly shaped beaks are specially adapted to separate mud and silt from the food they consume and, uniquely, are used upside-down. One species has been recorded in Colombia. Order: PodicipediformesFamily: Podicipedidae  Grebes are small to medium-large freshwater diving birds. They have lobed toes and are excellent swimmers and divers. However, they have their feet placed far back on the body, making them quite ungainly on land. Four species have been recorded in Colombia. Order: ColumbiformesFamily: Columbidae  Pigeons and doves are stout-bodied birds with short necks and short slender bills with a fleshy cere. Thirty-eight species have been recorded in Colombia. Order: CuculiformesFamily: Cuculidae  The family Cuculidae includes cuckoos, roadrunners, and anis. These birds are of variable size with slender bodies, long tails and strong legs. Twenty-one species have been recorded in Colombia. Order: SteatornithiformesFamily: Steatornithidae  The oilbird is a slim, long-winged bird related to the nightjars. It is nocturnal and a specialist feeder on the fruit of the oil palm. Order: NyctibiiformesFamily: Nyctibiidae  The potoos (sometimes called poor-me-ones) are large near passerine birds related to the nightjars and frogmouths. They are nocturnal insectivores which lack the bristles around the mouth found in the true nightjars.