If you start finding traffic cones in the middle of the road, you might be forgiven for thinking a local gang of youths were behind it.
But workers in New Zealand were given a shock after discovering that a mischievous group of kea birds had been dragging them there instead.
Even more bizarrely, the workers now think the keas were listening out for cars and then positioning the cones to get them to stop in the hopes of getting fed.
The film was taken at one end of a one-way tunnel, where the flow of traffic alternates between either end, meaning it stops for a few minutes at a time as it changes over.
Mr Thompson said: ‘We think the Kea listen for the cars in the tunnel and move the road cones between the streams of traffic.’
When the cars emerge from the tunnel, the birds are hoping they will be forced to stop, and may hand out some food while they’re there.