I'm afraid, despite our best efforts, with only 9 birds ringed (totals online — click Ringing) I'm still without anything amazingly exciting to talk about; though I make no apologies for posting some Siskin photos — they're such lovely bird, especially the males:
Two females — a 2cy and a 3+cy — provided a nice comparison.
Note the difference in the tertials — worn retained juvenile feathers on the 2cy.
The 2cy bird had two retained juvenile greater coverts.
At first glance, there's not too much difference between the primaries — the 2cy was very fresh and unworn (perhaps a bird that hatched late last year?). However, the 3+cy bird shows overall blacker primaries with less bleaching at the tip, while the central primaries are distinctly more square-cut, especially on the inner webs. Additionally, the 3+cy shows considerably more yellow at the base of the primaries.
As with the primaries, the tail of the 2cy is in extremely good condition. It appeared that R6 on the right side has been moulted/replaced; the other tail feathers are most likely juvenile tail feathers — despite their broad and rather rounded appearance, they are still relatively brown and worn at the tip when compared to the 3+cy bird's tail.