Two Caspian Terns far away on the opposite shore. Many White-winged Terns were resting around them.

Another Caspian Tern, a little apart from the others. This one was sitting down. It was startled by a Peregrine Falcon and flew up toward me, and when it got closer I could see something that looked like fishing line coming from its bill. I wonder if it had swallowed a fishing rig by mistake. There was a Caspian Tern with fishing line coming from its bill last year too.

The Caspian Tern from above was startled by the Peregrine Falcon and came toward me. Looking closely, I can see what appears to be tangled fishing line coming from the base of its bill.

The individual above. Even from the front, the tangled-looking line is visible.

A Saunders's Gull that ran and caught a fiddler crab.

Mangroves and Saunders's Gull. It's a scene you can only see in Okinawa.

From the wing pattern, this is a first-winter juvenile. Most of the other Saunders's Gulls were also juveniles.

Saunders's Gulls would sometimes dive steeply from low flight to catch crabs.

Fiddler crabs — prey for Saunders's Gulls, Eurasian Curlews and others. There are huge numbers of them.

Eurasian Curlew.

A White Wagtail also came by and caught a small crab.

A Spot-billed Duck and a male Mallard with juveniles, startled by a Peregrine Falcon that arrived. I hadn't noticed them when they were down on the tidal flat.