An experiment to spay hundreds of seagulls with coloured food dye has helped a New Zealand airport deal with the risk of bird strikes endangering flights.
The kelp gulls, widely known as black-backed gulls in New Zealand, have become such a problem that Wellington Airport decided to stake out three landfills around the city to see which is their favourite feeding site, the Stuff news site reports.
Staff and members of the public then logged sightings of the variously-hued gulls on the airport website.
[BBC News]
