Feathers fly in city

CITY life often brings out the aggressive side in humans – and the same seems to be true of birds.

A study found that great tits living in cities are bolder than their country cousins and defend their territory with far more aggression.

Scientists believe birds adjust their behaviour depending on their habitat – and the amount of human interference to which they are exposed.

While urban tits are bad tempered, which scientists think is because of the constant stress they experience from humans, those in the country appear far more relaxed.