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Related Experiment Video

Updated: Feb 11, 2026

Synthesis of Phase-shift Nanoemulsions with Narrow Size Distributions for Acoustic Droplet Vaporization and Bubble-enhanced Ultrasound-mediated Ablation
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Droplet bubbling evaporatively cools a blowfly.

Guilherme Gomes1, Roland Köberle2, Claudio J Von Zuben3

  • 1Department of Physics and Interdisciplinary Science, São Carlos Institute of Physics (IFSC), University of São Paulo (USP), 13566-590, São Carlos-SP, Brazil. guigomes@gmail.com.

Scientific Reports
|April 21, 2018
PubMed
Summary

Flies use a unique "bubbling" behavior to cool their bodies through evaporative cooling. This process, involving fluid droplets, effectively lowers body temperature, especially in warmer conditions.

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Area of Science:

  • Zoology
  • Animal Physiology
  • Thermoregulation

Background:

  • Terrestrial animals utilize evaporative cooling (e.g., sweating, panting) to regulate body temperature.
  • Dipteran flies exhibit a "bubbling" behavior, cyclically moving fluid droplets in and out of their buccopharyngeal cavity.
  • This fluid, a mix of ingested food, salivary enzymes, and antimicrobials, is linked to dehydration of liquid meals.

Purpose of the Study:

  • To investigate the role of the "bubbling" behavior in thermoregulation in Diptera.
  • To determine if evaporative cooling via fluid droplet manipulation contributes to body temperature regulation in flies.

Main Methods:

  • Infrared imaging was used to monitor body temperature changes in the blowfly, Chrysomya megacephala, during bubbling behavior.
  • Measurements of bubbling frequency in relation to ambient temperature and humidity were recorded.
  • Heat transfer calculations were performed to analyze the cooling dynamics of the fluid droplet.

Main Results:

  • Evaporation of extruded fluid droplets significantly lowered the blowfly's body temperature, particularly in the cephalic region.
  • Bubbling frequency increased with rising ambient temperatures.
  • Cooling efficiency diminished under conditions of high air humidity.

Conclusions:

  • The "bubbling" behavior in blowflies is an effective mechanism for evaporative cooling and thermoregulation.
  • The cooling effect is dependent on ambient temperature and humidity, with a unique heat-exchange dynamic.
  • This behavior provides a crucial strategy for flies to manage body heat in terrestrial environments.