In the north of Berlin, just beyond the city boundary is a beautiful wetland called Tegeler Fließ. Here the naturalist Alexander von Humboldt spent his childhood. Today, this area is not only scenic impressive, it also home to a good number of bird species. Since it is only 45 minutes away from my home, I often go there - during the post-breeding season especially to make recordings of grasshoppers and aquatic insects. Here is a short excerpt from one of those underwater sound recording.