There's a rigid "pecking order" (pun intended) amongst the birds. Find a perch on one of the concrete bollards ...
... fiercely defend your perch until forced by a larger and more vociferous bird to vacate it. Pass the ousting down along the line.
Settle down with a triumphant shriek and begin the whole process again.
Adopt an elegant pose against the setting sun, always keeping a beady eye on passing humans who might provide a tasty snack.
Fly away in alarm at too close approach of humans.
Out over the sea towards the setting sun. Or, more realistically, to relocate to other places where the pickings are more plentiful.
Leaving the promenade to human enjoyment.