What Is This ‘Bird Theory’ Trend Going Viral on TikTok?

The "Bird Theory" Trend on TikTok

A popular trend is currently testing relationships on TikTok. The "Bird Theory" trend involves telling a partner that you saw a bird and recording their reaction.

Thousands of users are participating in this trend, which has nothing to do with birds, but rather is a test of a partner's engagement using a method known as the "Bid Test".

The viral TikTok trend is all about testing your relationship.

Couples are flocking to TikTok to share their experiences with this trend, making it a viral sensation.

Author's summary: TikTok's "Bird Theory" trend tests relationships.

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Mental Floss Mental Floss — 2025-10-29

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