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Birds' songs have adapted to city environments. Noisy humans cause an upward shift in song frequency.
See a mockingbird imitate a car alarm >>
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Crows will exchange objects with humans they know.
They have reportedly given gifts to families who feed them.
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Problem solving, making tools, and planning ahead all help birds navigate cityscapes.
Gulls and crows use their big brains to get by in the concrete jungle.
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Turkey vultures have a special power useful to humans: They can find gas leaks.
The vultures are attracted to the rotten scent people use to detect odorless gas.
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