As the sun dips lower and lower towards towards the horizon, the Sea Point public swimming baths, closed for the night, are strangely deserted.
A few seagulls fly in to do their "floating duck" thing on the unruffled surface of the pools.
The numbers begin to swell.
And at last the mystery as to where seagulls go, between their day and night shifts, is solved. They fly in for sundowners!
Suddenly, in a seemingly joint decision, a great cloud of birds depart the pools and head for the restaurant strips and apartment blocks of Sea Point.
So now you know!