When do bedbugs fly? - briefly
Bedbugs cannot fly; they move solely by crawling or by attaching themselves to clothing, luggage, or furniture for transport.
When do bedbugs fly? - in detail
Bedbugs are not capable of sustained flight; they move by crawling and, when necessary, by a brief, passive “jump” known as “flotation.” This behavior occurs under specific conditions:
- Temperature: Ambient heat above 25 °C (77 °F) increases metabolic activity, prompting occasional upward movement toward light sources.
- Disturbance: Mechanical vibration, exposure to insecticide fumes, or sudden changes in the environment can trigger a short, soaring escape.
- Humidity: Low relative humidity (below 50 %) can motivate insects to seek higher, more humid micro‑habitats, sometimes resulting in a brief lift.
- Light: Strong illumination may cause nymphs and adults to move upward, appearing as if they are taking off, especially during nighttime when artificial lights are on.
The “flight‑like” episode is limited to a few seconds and does not involve winged propulsion. It is essentially a passive lift produced by the insect’s body shape and air currents, allowing the bug to cross small gaps or reach higher surfaces. Consequently, any observation of bedbugs appearing to fly is actually a short, non‑aerodynamic maneuver triggered by the factors listed above.