The Lesser Nighthawk By Larry Liese. Common Nighthawk: Lesser Nighthawk has white band on wing nearer wingtips, with primaries above the band showing buff spots.. The Lesser Nighthawk is very similar to the Common Nighthawk, a bird found over much of the U.S. and Canada during the summer months. Cryptically colored, it is mottled brown, buff, and black, with distinctive white crescents on its wing and throat. Tail is dark brown and has thin white bars across top. When it was first discovered there in 1941 it was considered to be only a subspecies of the Common Nighthawk, as it looks very similar; however, its voice is different. Lesser Nighthawk: Medium-sized nightjar with gray and white mottled upperparts, white throat, and brown and white mottled underparts with dark belly bars. Darting erratic flight.

The lesser nighthawk (Chordeiles acutipennis) is a nightjar found throughout a large part of the Americas. It will typically captures aerial insects in scoop of its open mouth. Poorwills also fly at night, but their wings are all brown, and the call is "poor-will." Tail is dark brown and has thin white bars across top.

They may also fly on moonlit nights. ... She cools herself with sometimes continuous gular fluttering (a cooling behavior in which birds rapidly flap membranes in the throat to increase evaporation) plus makes use of other adaptations to lessen the sun’s effect. Common Nighthawk: Call is made in flight, a repeated, nasal "peent." The Lesser Nighthawk obtains nearly all of its food in flight. The tail is dark with white barring; the underparts are buffy with fine black horizontal streaking. In the glow of twilight, the Lesser Nighthawk flies almost like a butterfly on buoyant wings with its mouth wide open, inhaling insects that fly near. United States - Arizona (AZ) (US) 2009-05-27 Wil leurs I've seen this species! Nancy Christensen reported at least 30 Lesser Nighthawks at dusk on Rangeland Road, near the Ramona Grasslands Preserve (site guide here) on June 25 and 26, 2015.

Steven C. Latta and Michael E. Baltz Version: 1.0 — Published March 4, 2020 Text last updated October 1, 2012

The adults are dark with brown, grey and white patterning on the upperparts and breast; the long upperwings are black and show a white bar in flight. The remaining articles (Distribution, Habitat, Behavior, etc. Identification & Behavior: ~ 21 cm (8.2 in). They will generally forage at dusk and dawn, and sometimes hunts at midday, especially in cloudy weather.

Where to Find: Out in the desert. Unlock thousands of full-length species accounts and hundreds of bird family overviews when you subscribe to Birds of the World. Common Nighthawks are flamboyant birds, flying high and calling loudly; but Lesser Nighthawks tend to fly low, and they usually maintain an eerie silence, floating like ghosts over the desert at dusk. The underparts are barred. In the glow of twilight, the Lesser Nighthawk flies almost like a butterfly on buoyant wings with its mouth wide open, inhaling insects that fly near. The highly camouflaged Lesser Nighthawk sits motionless during the day, but takes flight as the desert heat starts to dissipate. The nest is placed on bare sand or gravel on the ground or occasionally Wings produce a hollow booming sound when pulling out of a steep dive, lending to the common name of Boom Bat in the south. Wings are dark with conspicuous pale patches visible in flight.

I had not yet seen this species in San Diego County. More. The Lesser Nighthawk of the Southwest looks very much like the Common Nighthawk, widespread in North America, but the species differ in behavior.

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