The Tokyo Metropolitan Government plans to launch a sweeping operation this month against the capital's crows, notorious for attacking piles of garbage and even small animals.

Tokyo officials will set up wood-and-wire cages at some 100 locations in the capital, including parks, in a campaign to crack down on the birds.

The cages will be 3 x 4 x 3 meters in dimension, and will have wiring at the entrance designed to catch a crow's feathers after it enters the cage and prevent it from getting out.