Pest control officials have begun gassing up to 18,000 geese close to Amsterdam’s Schiphol airport in an effort to increase air safety.

The killing of 500 geese a day is taking place behind black security walls under the supervision of government protection officials following threats from animal rights activists.
The government has allowed the mass killing because of the risk of collisions between aircraft and flocks of geese. In 2010, a Maroc Air plane was forced to make an emergency landing after geese hit the motor.
Bird protection groups say it would be more humane to grow different crops around the airport to discourage the birds from feeding there.