The Egyptian goose (Alopochen aegyptiaca) is native to Africa south of the Sahara and the Nile valley. It was a rarity when I first arrived in the Netherlands more than 30 years ago. I used to see a lonely specimen along the canal when I cycled to work and had pity because it seemed to have no friend. Meanwhile it is included in the list of Invasive Alien Species of Union concern. In the warm winters they have proliferated and there are thousands
