Heard...but not seen!

During the five hours or so we spent at Kew Gardens on Tuesday, we heard parakeets in the trees all around us, but despite searching we never got to see any of them (not helped by the fact they are green of course!).  The nearest we got was finding this tiny green feather (about the size of my thumb nail), if I'd been quick enough I suppose I could have entered it for 'Tiny Tuesday'!