Green plants in the windowsill provides new species to the city… and the countryside!
Sometimes you find animals in the windowsill, where you have no idea where they come from.
Maybe the season is not right or the animals are either very large or very numerous making you think that it is unlikely that they came all the way from the countryside. When this happens, you have to ask yourself where else these animals could come from. In these cases, the green plants are obvious candidates to check for vermin or traces of this. Are there holes in the soil around the plant roots? Are there traces of cocoons or webs underneath the leaves? Or do the leaves and flowers have weird bite marks?
It will most often be common Danish species, which have moved into the windowsills’ exotic plants, but sometimes animals from entirely different continents have ridden along as blind passengers.
The majority of these cannot survive in the Danish nature, but some will settle and spread out in Denmark.
The moth, Duponchelia fovealis, is a good example of such an animal spreading through Denmark. The moth was first discovered in 1997 and has most likely arrived with begonias from southern European plantations. Ever since, the moth has settled in Denmark and it can now be found in many cities as the caterpillars live off various plants.