Two black birds in Zhengzhou, capital of Henan Province, have attacked more than 50 men sporting T-shirts on the city's Funiu Road in the past 20 days.

Three of the victims have even bled as a result of the pecking.

Seemingly, the two birds never attack women, children and senior citizens, and incidentally, all their victims are young men walking around in T-shirts.

Zoologists believe the two birds are avenging their baby's death 20 days ago.

The baby bird was killed after it fell to the ground from their nest. A man, wearing a T-shirt, picked up the dead bird and chucked it into a roadside dustbin.

(China Daily July 17, 2009)