A black-headed gull (Chroicocephalus ridibundus) stands on a concrete jetty in Lake Constance, surrounded by waves and a grey sky. Lake Constance, ...

A black-headed gull (*Chroicocephalus ridibundus*) stands on a concrete jetty at Lake Constance in Baden-Wuerttemberg, Germany. The scene captures the bird against a backdrop of gentle waves and a grey, overcast sky, illustrating a serene and natural setting by the water's edge. The jetty extends into the lake, partially submerged, adding to the tranquil yet dynamic atmosphere.