On behalf of Jo who sent in an email:-
Seen yesterday and today in rustic land near Beniganim, Valencia. I am not a bird watcher but was surprised to see a deep yellow bird about the size of a small magpie swoop across the road. It had smallish all black wings. It was monochromatic yellow all over apart from wings and possibly tail. I saw it in the same place. No photo but am intrigued.