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These Birds Can Count
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Key Facts In This Video
See how a "magic" box is used to hide mealworms and prove that birds can count: 00:34
New Zealand robins appear to count the number of mealworms that a researcher places into a box, and will search if they know one is missing. 00:59
The counting ability of New Zealand robins may stem from the fact that they commonly steal from one another. 01:20