Hello Deb,
thank you for your detailed answer. Regarding colours and artefacts vs. the real appearance of this bird, I should better looking on a second computer. You might be right regarding cautious approach in this case.
Sorry for confusion: this is not a juvenile Rock Bunting to me, I agree with you, they normally have a pale buffish ground colour to the breast in this plumage.
I still think, its a 1 CY Rock Bunting. I have seen similar Rock Buntings before, that looked similar to this bird here. Colouration and head-pattern similar to a female, but with heavy streaks to the breast (and with a clear cut boarder to the unstreaked belly).
I allways thought they were birds moulting from juvenile to first winter, because I have never seen a Rock Bunting in spring wih such a heavy streaked breast (but I have not enough experience to be sure of variation).
Looking a the picture again, the colours seems very good for a Rock Bunting, but you are right: I better wait, until looked at a second Computer.
I really meant "median crown stripe", but again I wait. But I still dont see a Cirl Bunting here.