How Birds Breathe: The Avian Respiratory System

Learn how birds breathe with their uniquely efficient system of rigid lungs and air sacs.

Episode:
125
Date:
November 18, 2025
Categories:

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How Birds Breathe: The Avian Respiratory System

Summary

Host Ivan Phillipsen takes listeners inside the amazing respiratory system of birds. He starts by grounding the topic in familiar territory—how mammal lungs work—before revealing how different the avian system really is.

The episode walks through the unique division of labor between birds’ small, rigid lungs and their large air sacs, and explains the elegant, one-way flow of air that keeps oxygen constantly moving across gas exchange surfaces.

The episode also looks back in time, exploring how this respiratory design first evolved. Listeners will come away with a deeper appreciation of what’s happening inside every bird with each breath.

Research Citations

Photos

Blue-banded Toucanet (Aulacorhyncus coeruleicinctus). Photo by christoph_moning/iNaturalist.

Attributions

  • Blue-banded Toucanet sounds (Xeno Canto recording XC1598)

This work by Ivan Phillipsen is licensed under CC BY-NC-SA 4.0

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