An Unsolved Mystery: the Disappearance of Urban House Sparrows0

• Earth & Environment, Share Your Science
• September 25, 2019

Walking through the centre of some European cities such as London, Amsterdam, Madrid or Prague, you may sense something is missing. If you have a quicker eye, you may have already realized that a specific bird is practically absent from the European skies1. The House Sparrow, a little brown bird, our winged neighbour par excellence