One very noisy visitor was a Great Spotted Woodpecker. I has a drumming tree somewhere near by, but I'm not sure where exactly. At least it not drumming on the metal cowling on out chimney this year.
It sat in the tree making it's loud "pic pic" call, and I noticed that each time it called the second eyelid, the "nictating membrane" blinked across the eye. I can understand this when it is drumming as I'm sure it would afford the eye some protection.
This little Blue-tit had to give up his place in the bird bath when gang of Greenfinches arrived. It was very patient and water on the side of hid turn to come again.
I noticed a Robin arrive, but it was a while before I saw that a second one had joined. As Robins can be very aggressive and quarrelsome birds I expected a fight.
Instead of the expected belligerence the first first bird started to beg and almost before I realised the second bird darted across and fed the gape in front of it.