Bedraggled little bird near Lisbon, Portugal

Looks like a goldfinch to me.
Maybe the yellow breast is artificial, from pollen or something else it has come into contact with?

I agree with Goldfinch. It might be a young one moulting into adult plumage or one with a plumage aberration.

Thanks TeeJay.. (or messy heroin sniffer?)

geoffff said:

or messy heroin sniffer?)

What is that supposed to mean.

Think we may have solved the marking mystery. The poor little thing is carrying a foot ring.

So it had probably been dabbed with a yellow marker by researchers to identify it in a goldfinch flock. Perhaps the researchers will pick up this thread?

From it's poor state, we wonder if it was migrating & how far it had come?

Think we may have solved the birds mystery markings. The poor little thing is carrying a foot ring.

So it had probably been dabbed with vivid yellow marker by researchers to identify it in a goldfinch flock. Perhaps the researchers will pick up this thread?

From it's poor condition, we wonder if it was migrating & perhaps blown offshore & if so, how far it had come?

It is returning to the balcony Wendy, but so far can't get good photo of the ring

Looking bit less bedraggled & more goldfinch now. Has a green leg ring, with perhaps 10 on it?

Definitely looking much smarter and I think it's a male going by the extent of the red by it's eye! Thanks for the update, haven't found any useful links to the colour ring!