yellow and black bird on tree branch
in Animals

8 things I have always wondered about birds

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5. How do birds know it is migration season?

flock of birds flying under blue sky during daytime
Bird migration is a wonder to many. Birds always migrate around the same time every year. How do they know that? Birds have a natural timing system, they tell time with the season they are in, the temperature of the place, and how and where the wind is blowing. It is a pretty cool system of telling time.

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