A genus of nightjar birds characterized by their whip-poor-will-like calls and nocturnal habits.
From Latin 'antrum' (cave) + Greek 'stoma' (mouth). The genus name reflects that these birds often nest in caves and have distinctive mouth/call structures.
The genus name literally means 'cave-mouthed'—these birds got their scientific name because they like to nest in caves and have such loud, distinctive calls that echo out like they're coming from deep chambers!
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