First stop was the enormous, open-fronted hide on Ryan's Field.
The first bird we spotted was a juvenile Moorhen, followed closely by 3 Common Sandpipers that were feeding on the mud. Scanning over the site we soon picked up a few Mediterranean Gulls, including a juvenile bird, a Little Egret, 1 Grey Heron, Herring Gulls and 2 Curlews. Just before we left, everything panicked and disappeared, as a female Sparrowhawk flew through and landed about 20m away.
From there, we walked the 300m or so to the Hayle Estuary. On the way we spotted this day-flying moth, most likely a Narrow-bordered 5-spot Burnet Moth. It could be the less common 5-spot Burnet Moth, but I can't be sure, so I'll stick with the commoner species..
Narrow-bordered 5-spot Burnet Moth
When we got to the estuary we scanned the mud flats and picked up dozens of Herring Gulls, a few more distant Mediterranean Gulls, a single Whimbrel (thanks Jayne) and 5 Black Swans.