| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | nightjar | European countries | Nightjar is a type of nocturnal bird that is rarely seen during the day. | 1 |
| 2 | nightjar | European culture | The nightjar is associated with folklore and superstitions, often believed to be an omen or harbinger of bad luck in some European cultures. | 1 |