No interactions present.
During the breading season Blue Tits can get very ragged looking. I remember one year on springwatch one of the parent birds lost almost all of its head feathers. It must be the stress of being a parent.
My blog: http://wolvobirder.blogspot.com
Thanks, I posted this as we wondered about the plumage on the head.
Lat/Lng: 50.9474, -0.496
OS grid ref: TQ057175