The starling and the peregrine falcon have had a great year, while the swallows have had a hard time when the supply of insects has been low in the cold.
- The adult birds manage and find enough food, but to support an entire litter is difficult when the weather conditions are bad, says Anders Wirdheim, bird expert.
In the clip, bird expert Anders Wirdheim explains why the birds have been affected differently by the weather this year.