Nacunda Nighthawk
Chordeiles nacunda
The nacunda nighthawk is not only the largest of the highly aerial nightjars known as nighthawks and the largest species of nightjar in the neotropics, it is one of the largest nightjar species in the world. Its length, at 27.5 to 32 cm (10.8 to 12.6 in), is somewhat less than the great eared-nightjar, which is typically considered the largest species in the family, but the nacunda may actually weigh a bit more on average. Six specimens of nacunda nighthawk were found to average 159 g (5.6 oz) in body mass, with range of 130 to 188 g (4.6 to 6.6 oz).
ID text from Wikipedia, CC BY-SA 4.0
Sand-colored Nighthawk
Chordeiles rupestris
The sand-colored nighthawk is 20.5 to 22 cm (8.1 to 8.7 in) long. Its upperparts are pale grayish brown with darker brown streaks, bars, and spots. The chin and throat are white to buffy white, the breast grayish white with a cinnamon tinge and brown bars and spots, and the belly white with brown spots on its upper part. The underside of the wing is also mostly white. Voice: The sand-colored nighthawk apparently seldom sings, but it does so from the ground, "a gurgling purr...interspersed with quiet throat-clearing sound and loud grawh notes." It also makes a variety of other vocalizations when chasing another bird or defending a nest.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Nacunda Nighthawk and Sand-colored Nighthawk.