Common Nighthawk vs Black Swift

In short

The Common Nighthawk and Black Swift are both aerial insectivores but differ significantly in structure and behavior. The nighthawk has a distinctive white wing bar and erratic flight, while the swift is uniformly dark with a more direct flight pattern. These differences are key for identification in the field.

Identification tips

1. Look for the white wing bar on the Common Nighthawk during flight. 2. Observe flight style: erratic and low for nighthawk, direct and high for swift. 3. Note habitat: open areas for nighthawk, mountainous regions for swift. 4. Listen for the 'peent' call of the nighthawk, as the swift is usually silent.

Size

Common Nighthawk is medium-sized with long, pointed wings and a slightly forked tail. Black Swift is larger and more robust, with long, narrow wings and a squared-off tail.

Plumage

Common Nighthawk has a mottled brown and gray plumage with a prominent white wing bar visible in flight. Black Swift is uniformly dark, appearing blackish overall, without any contrasting wing markings.

Behaviour

Common Nighthawk exhibits a distinctive, erratic flight pattern, often seen foraging at dawn and dusk. Black Swift flies higher and more directly, often in groups, and is less likely to be seen foraging at low altitudes.

Habitat

Common Nighthawk is found in open areas, including urban environments, grasslands, and forests. Black Swift prefers mountainous regions and is often associated with waterfalls and cliffs.

Voice

Common Nighthawk has a distinctive nasal 'peent' call, often heard during its aerial displays. Black Swift is generally silent, with vocalizations rarely heard.