photo: Richard Harris

This installation is called Where is the Dog of Erasmus? by German artist Ralf Witthaus. Using the playing field of one of Erasmus University's colleges, Mr.Witthaus claims to be "proposing a humorous and ironic event in the form of a performance. A spotlight on the contrasts present in the district. Watch out for the greedy crows!"

He mowed a big circle in the middle of the field and there are a lot of ravens which does give the place a The Birds feeling. As for the humor?