Terns

These are brilliant Phill. Well done!
I couldn't resist posting this from Norfolk Island.

White Tern

These delightful, graceful creatures are known here as 'Fairy Terns'. Snow-white but for their black bills, feet and eyes, they have translucent wings. The terns normally leave the island in May to spend several months at sea, constantly on the wing. However, some appear to have formed a love affair with the valley leading from Bumboras to the Shearwater villas and stay throughout the year. Around August 1st, their numbers swell and mating begins. White Terns build no nest and lay a single egg in a slight indentation in the branch of a Norfolk Pine or White Oak. It was once thought that they used a mucilage to assist the egg to adhere to the branch but this has been found to be untrue. The mother will somehow incubate the egg without dislodging it - you will notice that to leave the branch she drops off backwards. How the chicks hatch safely on this precarious perch is a source of great wonderment. If you look carefully at a tern returning from a fishing expedition, you will often notice up to five tiny flying fish in her beak which she has caught on the wing.

You will often notice two terns flying together, wheeling in such unison that they seem controlled by a single brain. The islanders will tell you gravely that this propensity to fly in pairs is because "one good tern deserves another".