Flock of Black-headed gulls relaxing on rocks in the fast flowing waters of the river Adige in Verona, Italy

blackheaded gulls seabird seagulls gull seagull blackheaded gull fast flowing flock birds wildlife rocks river island plumage avian group adige flapping bird birdwatching riverside adult veneto perch squabble nature blackheaded perching winter italy relaxing wild verona tiny closeup outdoor posing