Common Nighthawk

The Common Nighthawk (Chordeiles minor) is a medium-sized, highly camouflaged crepuscular bird belonging to the nightjar family, Caprimulgidae. Despite its common name, it is not a true hawk or raptor, but rather an aerial insectivore. Active primarily during dawn and dusk, these birds are known for their buoyant, erratic flight style as they sweep the skies for insects. During the breeding season, their distinctive nasal calls and dramatic aerial dives make them a conspicuous and fascinating sight across a variety of open landscapes.

Key Identification Marks

Identifying a Common Nighthawk is easiest when it is in flight:

• Wings: Long, narrow, and sharply pointed, resembling a silhouette of a falcon. A prominent, broad white stripe spans across the outer primaries, looking like a bright white patch in flight.
• Plumage: Highly cryptic, mottled gray, black, and brown patterns that perfectly mimic bark or gravel when the bird is perched. Underparts feature dark and light horizontal barring.
• Head and Throat: Large eyes, tiny bill with a deceptively wide mouth (gape). Males have a striking, broad white throat patch and a white subterminal tail band. Females have a buff-colored throat and lack the white tail band.

Similar Species

• Whip-poor-will: Lacks the white wing patches of the nighthawk, has rounded wings rather than pointed ones, and is highly nocturnal (rarely flies in daylight or early dusk).
• Lesser Nighthawk: Very similar but slightly smaller, with the white wing band positioned closer to the wingtips and a more buffy overall coloration. The Lesser Nighthawk's flight is lower to the ground, and its call is a low, rapid trill rather than a harsh peent.

Range and Migration

The Common Nighthawk is one of the most long-distance migratory species of any North American bird. They breed from the subarctic regions of Canada across most of the United States, transitioning south in massive flocks to winter deep within South America, primarily in the grasslands and open forests of Brazil, Paraguay, and Argentina.

Preferred Habitats

These birds require open ground for nesting and hunting, including:

• Grasslands, savannas, and prairies
• Open pine forests and burned-over areas
• Rocky outcrops and coastal beaches
• Urban environments where flat, gravel-covered rooftops provide mimicry of gravel bars for nesting sites. (Note: The transition from gravel to smooth rubber roofing material has led to notable regional urban declines.)

Flight and Feeding

Common Nighthawks are aerial foraging specialists. Their flight of erratic, jerky wingbeats followed by short glides has been described as "moth-like." They use their massive gapes to scoop up thousands of flying insects in mid-air, including flying ants, beetles, moths, and true bugs. They are frequently seen hunting around streetlights, sports stadiums, and over water bodies where insects congregate.

Courtship and the "Boom"

During the breeding season, males perform spectacular courtship displays. After flying high into the air, the male dives steeply toward the ground. At the bottom of the dive, he flexes his wings downward, creating a loud, resonating rushing noise—called a "boom"—produced by the air rushing through his primary feathers. This dive is accompanied by a sharp, nasal peent call.

Nesting

They do not build nest structures. Instead, females lay two speckled eggs directly on bare ground, gravel, or flat rooftops. The eggs and the incubating parent are brilliantly camouflaged, remaining virtually invisible until nearly stepped upon.