Bee Poop, Yellow Rain, and the Bee Gut

Season 7 Episode 11: About Bees, Culture & Curiosity Podcast – Bee Poop, Yellow Rain, and the Bee Gut

Honey bees refuse to defecate inside their hive all winter—and when the first warm day arrives, thousands of bees take a sudden cleansing flight. In this episode, we explore one of the stranger realities of beekeeping: the honey bee digestive system and the dramatic spring event known as the cleansing flight.

From my snowy backyard apiary in Calgary, Alberta, we begin with the subtle signs of early spring. The sun is higher, the hive entrance warms, and a few brave bees take flight—even when temperatures hover just above freezing.

Honey bees spend the entire winter confined inside the hive, eating stored honey but refusing to defecate indoors. Instead, they store waste in their hindgut until a warm day finally arrives. When it does, thousands of bees launch into the air to relieve themselves in spectacular cleansing flights.

Today, we'll explore the biology of the bee gut, why hive hygiene is critical to colony health, and what happens when digestion goes wrong through dysentery or Nosema infection.

We even take a detour into Cold War history, when mysterious "Yellow Rain" falling over Southeast Asia was eventually linked to mass defecation flights of giant Asian honey bees.

Yes, really.

Recorded in Calgary, Alberta, Canada in March 2026.

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About Ron Miksha: https://about-bees.org/about-ron/

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