Hippos can recognise their friends’ voices

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Wild hippos honk to each other and can recognise their companions’ voices, a study has found. …

They found hippos could tell apart friends, neighbours and strangers from their voices. In addition to telling apart friend from foe (or, at least, unfamiliar hippos), the animals can probably distinguish between individuals, according to the researchers – though they can’t be absolutely certain of this.

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