Birds sing the most about an hour before dawn, when the air is at its stillest. Theoretically, this enables sounds to travel farther, making song up to 20 times more effective than if sung at midday.
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i means seals, sea lions, penguins have specific calls to identify thier babies.
If I remember, dogs have been proven to have accents. I mean, it makes sense. Animals growing up in different regions of the planets would communicate differently
