Thanks Michael :-) . Its the very last bird in the Collins guide. I must have overlooked it. I was thinking it might have been a South Arabian Waxbill, but again, I don't know what one looks like. There aren't any decent bird books available in Saudi Arabia. Not even for their own birds. I'm sure I could get one from Amazon but I've had too many books go missing in the erratic Saudi mail. I'll bring one back from my next leave.