Birthday bash at Barden

I managed to get a few more pictures at Barden today, and I was a bit luckier with flying birds. Here is an adult that doesn't seem to have started its head moult at all yet.  The wings are quite blurry - I'm not sure if this is due to a shallow depth of focus, or to the speed of the wing movement:

Here is another, still at roughly the same stage of moult. The bill is also still quite orangey, or at most a medium red, rather than the breeding dark red. There could just be a black line along the outside top of P8, and see the picture a further two down for possible confirmation.

Moving on to another bird now, this one partly through the head moult

This is another bird, at about the same stage of the head moult, but one of the best candidates for a second winter bird that I have seen, with really clear black lines along parts of the edges of P7, P8, P9 and P10:

And here is a first winter bird for comparison - note the almost complete black lines along the edges of the outer primaries, together with the typical patches of brown and sooty black along the coverts. Note the very yellow orangey bill:

This first winter bird below (different to the one above) is showing two white tail feathers, T1 and T2. This can occur, according to Olsen, as an early part of the spring moult to summer plumage, although in this case this would be an early example, and apparently prior to any head moult in this particular individual. Morg of Morgithology mentions seeing something like this in 2010, but was also unsure of a definitive explanation. These particular white feathers look as though they are projecting out further than their dark-tipped neighbours.