It’s green, the male has a rose-coloured ring around his neck, and there are about 10,000 of them living in Brussels. It’s the rose-ringed parakeet (Psittacula krameri), also known as the ring-necked parakeet, and according to the conservation organisation Leefmilieu Brussel (LMB), there are between 3,500 and 5,000 feral pairs living in the capital.