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Induced airflow cools hovering bumble bees
Jordan R Glass1, Christopher Petranek1, Michael E Dillon1
1Department of Zoology and Physiology, University of Wyoming, Laramie, WY82071, USA.
Proceedings. Biological Sciences
|February 17, 2026
Summary
Flying insects use self-generated airflow for cooling, crucial for survival. This overlooked mechanism significantly impacts insect heat budgets and thermal stability during flight.
Area of Science:
- Insect physiology
- Aerodynamics
- Thermoregulation
Background:
- Flying insects face challenges managing heat exchange in varying thermal environments.
- The cooling effect of self-generated airflow from insect flight is poorly understood.
Purpose of the Study:
- To investigate the cooling effect of self-induced airflow in flying insects.
- To quantify the contribution of self-generated wind to insect thermal stability.
Main Methods:
- Measured airflow and wingbeat kinematics in hovering bumble bees.
- Assessed cooling effects of equivalent airflows in a wind tunnel.
- Utilized heat balance models to predict insect body temperatures.
Main Results:
- Self-induced airflow was substantial (up to 1 m/s) and size-dependent.
- This airflow significantly enhanced thermal stability for bumble bees.
- Simulated bees overheated without self-induced airflow across various conditions.
Conclusions:
- Self-generated airflow is a critical, overlooked heat-loss mechanism for flying insects.
- Changes in wingbeat kinematics affect both heat production and convective heat loss.
- This mechanism is vital for insect survival in dynamic thermal environments.
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