Nighthawk (noun)

A bird of prey with a distinctive, wide-mouthed call, characterized by its active, aerial hunting at night.

Origin:

From the old english night-hwæcce, meaning 'night watchman'.

Examples:

1. The nighthawk swooped through the night sky, catching insects in its wide, open beak.
2. The campers were disturbed by the loud calls of the nighthawks in the trees overhead.
3. The nighthawk was a common sight on summer evenings, its silhouette distinguishable against the stars.
4. The ornithologist was fascinated by the nighthawk's unique hunting style, swooping down from the sky to catch prey.
5. The nighthawk's distinctive call echoed through the night sky, an eerie reminder of the wild, hunting creatures above.