Cuculidae The family Cuculidae includes cuckoos, roadrunners, and anis. These birds are of variable size with slender bodies, long tails and strong legs. Guira cuckoo, Guira guira Greater ani, Crotophaga major Smooth-billed ani, Crotophaga ani Striped cuckoo, Tapera naevia Pheasant cuckoo, Dromococcyx phasianellus Pavonine cuckoo, Dromococcyx pavoninus Rufous-vented ground-cuckoo, Neomorphus geoffroyi Scaled ground-cuckoo, Neomorphus squamiger (E) (vulnerable) Rufous-winged ground-cuckoo, Neomorphus rufipennis Red-billed ground-cuckoo, Neomorphus pucheranii Little cuckoo, Coccycua minuta Dwarf cuckoo, Coccycua pumila (H) Ash-colored cuckoo, Coccycua cinerea Squirrel cuckoo, Piaya cayana Black-bellied cuckoo, Piaya melanogaster Dark-billed cuckoo, Coccyzus melacoryphus Yellow-billed cuckoo, Coccyzus americanus Pearly-breasted cuckoo, Coccyzus euleri Mangrove cuckoo, Coccyzus minor Black-billed cuckoo, Coccyzus erythropthalmus (V) Common cuckoo, Cuculus canorus (V) Oilbird 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. Oilbird, Steatornis caripensis Potoos 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. Rufous potoo, Phyllaemulor bracteatus Great potoo, Nyctibius grandis Long-tailed potoo, Nyctibius aethereus Common potoo, Nyctibius griseus White-winged potoo, Nyctibius leucopterus Nightjars 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. Nacunda nighthawk, Chordeiles nacunda Least nighthawk, Chordeiles pusillus Sand-colored nighthawk, Chordeiles rupestris Lesser nighthawk, Chordeiles acutipennis Common nighthawk, Chordeiles minor Antillean nighthawk, Chordeiles gundlachii (V) Short-tailed nighthawk, Lurocalis semitorquatus Band-tailed nighthawk, Nyctiprogne leucopyga (see note) Bahian nighthawk, Nyctiprogne vielliardi (E) Blackish nightjar, Nyctipolus nigrescens Pygmy nightjar, Nyctipolus hirundinaceus (E) Band-winged nightjar, Systellura longirostris Common pauraque, Nyctidromus albicollis White-winged nightjar, Eleothreptus candicans (endangered) Sickle-winged nightjar, Eleothreptus anomalus (near-threatened) Todd's nightjar, Setopagis heterura Little nightjar, Setopagis parvula Roraiman nightjar, Setopagis whitelyi White-tailed nightjar, Hydropsalis cayennensis Spot-tailed nightjar, Hydropsalis maculicaudus Ladder-tailed nightjar, Hydropsalis climacocerca Scissor-tailed nightjar, Hydropsalis torquata Long-trained nightjar, Macropsalis forcipata Ocellated poorwill, Nyctiphrynus ocellatus Silky-tailed nightjar, Antrostous sericocaudatus Rufous nightjar, Antrostomus rufus Swifts Order: ApodiformesFamily: 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