From National Geographic News:
Bees Enlisted to Attack Crows in TokyoThis has Bad Idea Jeans written all over it.
Conservationists hope bees will repel the crows, based on the insects' tendency to attack anything dark-colored that approaches their hives.
This year beehives from rural areas were relocated to the top of a large water-treatment facility near Tokyo's international airport, where as many as 4,000 birds known as little terns nest after a long migration from Australia, New Zealand, and Papua New Guinea.