Officials initially thought they were from a passing airplane's lavatory fluid. Not so says an FAA spokesperson, instead they now say the purple mess from berry eating birds. Residents aren't convinced with that explanation saying the mess is far too large to have been left by birds. Residents in Tokyo have noticed a decline in the number of squirrels lately. He says that ever since the city started a campaign of cleaning up and keeping trash under wraps that hungry crows have taken to hunting the squirrels.
Crows are omniverous and the suirrels have been scurrying away when the crows appraoch.
They had sued alleging invasion of privacy and receiving stolen property. No mention of terms of the settlement.