When I see the Ring-billed Gulls hanging around Pelicans I know what they are after. Gulls are the aggressive thieves that try to steal fish from Pelicans.
But what about Cormorants? Do Ring-billed Gulls steal fish from them also? Yes, they steal. Gulls appear to be simple birds but they don't wait passively for fish, they are actively stealing. Stealing over the years Gulls developed many tricks and techniques to get a free meal.
The Gulls are very intelligent and adaptive to their environment. They are not monstrous, they are great survivors.
Generally, life is good!