Hydropsalis
- Ladder-tailed Nightjar Hydropsalis climacocerca
It is gray-brown with fine markings. The male has a long tail that looks W-shaped when spread. It is nocturnal and occurs along rivers.
- Spot-tailed Nightjar Hydropsalis maculicaudus
Spot-tailed Nightjars rest on the ground or low branches by day and become active around dusk and at night. Adult males show white tips on the outer tail feathers; the species ranges from southeastern Mexico to Paraguay.
- Scissor-tailed Nightjar Hydropsalis torquata
The male has outer tail feathers that extend well beyond the body. This nightjar rests on the ground and catches flying insects at dusk and after dark.
- White-tailed Nightjar Hydropsalis cayennensis
The White-tailed Nightjar is nocturnal and has strongly different plumages in males and females. Males have a broad white wing band and a tail that is white underneath. It hunts insects at night over dry grassland and savanna in lowlands.
- Scissor-tailed Nightjar Hydropsalis torquata
The male has outer tail feathers that extend well beyond the body. This nightjar rests on the ground and catches flying insects at dusk and after dark.
- Ladder-tailed Nightjar Hydropsalis climacocerca
It is gray-brown with fine markings. The male has a long tail that looks W-shaped when spread. It is nocturnal and occurs along rivers.
- Spot-tailed Nightjar Hydropsalis maculicaudus
Spot-tailed Nightjars rest on the ground or low branches by day and become active around dusk and at night. Adult males show white tips on the outer tail feathers; the species ranges from southeastern Mexico to Paraguay.