Our house has the large screened-in lanai (veranda) to the left of the white house with the dark roof.
Every evening, I see great white birds flying in from all directions: egrets. They congregate in one spot. Curious why, I got up early one morning to catch them before they disperse into their fishing grounds. Although the sun had not come up yet, they were long gone before I arrived. Only the ones whose territory is nearby slept in.
This island is their safe haven for the night.