Plain Nightjar vs Bates's Nightjar

In short

The Plain Nightjar and Bates's Nightjar are both cryptically colored, but the most reliable difference is their habitat preference, with Plain Nightjar favoring open areas and Bates's Nightjar more forested environments. Structural differences are subtle, but Bates's Nightjar tends to have a slightly shorter tail and wings.

Identification tips

1. Habitat: Check the surrounding environment; open areas suggest Plain Nightjar, while dense forests suggest Bates's Nightjar. 2. Tail and Wing Length: Bates's Nightjar may have slightly shorter tail and wings. 3. Vocalization: Listen for the mechanical call of the Plain Nightjar. 4. Plumage Tone: Be cautious; plumage color is not a reliable field mark due to variability and lighting conditions.

Size

Both species are similar in size, typical of nightjars, and differences are not easily observed in the field.

Plumage

Both species have cryptic plumage with mottled browns and grays. Bates's Nightjar may appear slightly darker, but this is not a reliable field mark.

Behaviour

Both species exhibit typical nightjar behavior, being nocturnal and often seen hawking for insects at dusk or dawn.

Habitat

Plain Nightjar is more often found in open areas, savannas, and grasslands, while Bates's Nightjar prefers dense, humid forests.

Voice

Vocalizations differ, with Plain Nightjar having a more mechanical, repetitive call, whereas Bates's Nightjar's call is less well-documented but considered softer and less mechanical.