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

The "Bird Theory" Trend on TikTok

A new trend is taking over TikTok, with thousands of users participating in the "Bird Theory" challenge.

This trend involves telling a partner that you saw a bird and recording their reaction, but it's not actually about birds.

The "Bird Theory" videos have nothing to do with bird videos or aren't even about birds at all.

Instead, the trend is about testing relationships using a method known as the "Bid Test" to gauge a partner's engagement.

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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