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The Zoo Weigh-In Edition

On weighing 10,000 animals in a single week.

Louis Cheslaw's avatar
Louis Cheslaw
Aug 20, 2025
∙ Paid

Louis here. Yesterday was the first day of London Zoo’s week-long annual animal weigh-in.

Despite growing up in the city, I had no idea this existed. But here are the basic, delightful details:

  • More than 10,000 animals—from the smallest snail to the tallest giraffe—will be weighed over the next few days.

  • The information is then shared with institutions around the world, to increase understanding of endangered or threatened species.

  • The BBC has been providing live coverage of some sessions. Yesterday, excited reporters enjoyed Polly, the giant Galapagos tortoise, accidentally tipping the scales. (Attention-loving capybaras Kiwi and Gizmo were two other hits, as everyone waited for the Humboldt penguins headline act.)

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