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Blasted barnacles! Large flocks of geese causing headaches for Copenhagen’s air traffic controllers

Stephen Gadd
April 3rd, 2017


This article is more than 7 years old.

Measure being taken to dissuade the birds from visiting the area and surrounding airspace

Barnacle geese can destroy jet motors (photo: Jin Zan)

Increasing numbers of barnacle geese migrating through Denmark have become a problem at Copenhagen Airport. The geese are so large that they can damage or destroy a jet motor.

READ ALSO: Bird colonies thriving on Peberholm

Over the last 40 years, the numbers have gone up from around 200,000 to about half a million. The tendency is for the trend to continue, Professor Jesper Madsen, the head of the Institute for Bioscience at Aarhus University, told DR Nyheder.

“We expect that the numbers of barnacle geese will increase from 500,000 to 3 million over the next 10 years. This will obviously cause problems for air traffic,” said Madsen.

More food available
The numbers of geese have increased because there is a lot of food available both in Denmark and further south and in the summer reservations used by the geese in northern Russia.

The number of ‘bird strikes’ has increased significantly. Between 1997 and 2006 there were only three collisions between geese and aircraft around Copenhagen, but between 2007 and 2016, there were 16.

Canadian geese have been sighted by pilots at an altitude of 9,000 feet (just under 3,000 metres), but it is not believed barnacle geese tend to climb so high.

Guns or stomach ache?
The problem is so acute that a June meeting has been called with representatives from 22 countries to discuss how to solve the problem.

Copenhagen Airport already has some ideas regarding how to scare the geese away from the area. Hunters are on the watch around the clock with fireworks, shotguns and sirens.

As well as that, a special type of grass has been sown in areas around the airport that gives the geese stomach ache if they eat it, thus encouraging them not to land and then take off again.


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A survey carried out by Megafon for TV2 has found that 71 percent of parents have handed over children to daycare in spite of them being sick.

Moreover, 21 percent of those surveyed admitted to medicating their kids with paracetamol, such as Panodil, before sending them to school.

The FOLA parents’ organisation is shocked by the findings.

“I think it is absolutely crazy. It simply cannot be that a child goes to school sick and plays with lots of other children. Then we are faced with the fact that they will infect the whole institution,” said FOLA chair Signe Nielsen.

Pill pushers
At the Børnehuset daycare institution in Silkeborg a meeting was called where parents were implored not to bring their sick children to school.

At Børnehuset there are fears that parents prefer to pack their kids off with a pill without informing teachers.

“We occasionally have children who that they have had a pill for breakfast,” said headteacher Susanne Bødker. “You might think that it is a Panodil more than a vitamin pill, if it is a child who has just been sick, for example.”

Parents sick and tired
Parents, when confronted, often cite pressure at work as a reason for not being able to stay at home with their children.

Many declare that they simply cannot take another day off, as they are afraid of being fired.

Allan Randrup Thomsen, a professor of virology at KU, has heavily criticised the parents’ actions, describing the current situation as a “vicious circle”.

“It promotes the spread of viruses, and it adds momentum to a cycle where parents are pressured by high levels of sick-leave. If they then choose to send the children to daycare while they are still recovering, they keep the epidemic going in daycares, and this in turn puts a greater burden on the parents.”