known from the Eocene and Oligocene of Europe, are the closest known relatives of nightjars.

Caprimulgidae

Traditionally, nightjars have been divided into two subfamilies: the Caprimulginae, or typical nightjars and the Chordeilinae. The Chordeilinae included species with short bills and lack of elongated rictal bristles in the genera Nyctiprogne, Lurocalis and Chordeiles.

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