Ключевые слова: barcelona, city center seagulls, flying, seabird, seabirds, seagull, seagull behavior in builtup areas, seagull interactions with urban infrastructure, seagull population in urban environments, seagull sightings in city center, seagulls, seagulls adapting to city life, seagulls flying in downtown, seagulls in urban areas, urban bird behavior, urban seagulls, urban wildlife,