NOW I will have to catch it...

... for a better look.
I christened this one "Strokable".
It always seemed so glad to see me, and virtually danced in circles towards me as I approached the feeding station.
It must, also have worked out that by allowing itself to be stroked while eating kept the rest at bay while it struggled with feeding.
Today I spotted what looked like something stuck to its beak. Went in, grabbed camera, took a shot or three and uploaded them for a better look. Watching it eat, I'm surprised it hasn't died of hunger.
Watch this space for further developments.