This image depicts an urban underpass in Uppsala, Sweden

This image depicts an urban underpass in Uppsala, Sweden. A congregation of approximately 30 to 40 rock pigeons (Columba livia) is scattered across a concrete-tiled pavement, which exhibits significant accumulation of bird droppings. In the lower left foreground, a metal grate is visible. Adjacent to the pavement, a wet asphalt roadway extends into the background. The underpass walls are constructed from textured, dark grey panels arranged horizontally. The light-colored concrete ceiling features multiple recessed rectangular luminaires and smaller circular lights, along with several ceiling-mounted surveillance cameras. A light-colored pole, supporting an unreadable rectangular sign, is anchored in a concrete barrier marked with yellow and orange panels, positioned on the pavement towards the right side of the frame. The pigeons are generally stationary or moving slowly on the pavement; no other subjects or explicit actions are observed.