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. The trend involves telling your partner you saw a bird and recording their reaction.

The purpose of this trend is to test relationships using a method known as the "Bid Test", which gauges your partner's engagement.

It's about testing your relationship by using a scientific method

Despite its name, the "Bird Theory" trend has nothing to do with birds. Instead, it's a way for couples to assess their partner's interest and engagement in their relationship.

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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