From Science Magazine.

African penguins, as well as members of two closely related species, sport individually unique patterns of black dots on their white chest feathers.

In a study published in Animal Behaviour, researchers have discovered the birds use these dots like name tags to help identify their mates, perhaps to recognize them amid throngs of similar-looking penguins.

Read more: https://scim.ag/4rApm8A

FOOTAGE CREDIT: BACIADONNA ET AL./ANIMAL BEHAVIOUR

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