Is this a Sparrow?

[bernhund]

I took this picture in Malta of what to me looks like a Sparrow, but is it? I've looked at various types of Sparrow online but can't quite be sure. Any ornithologists out there?

[bernhund]

So a Sparrow isn't just a Sparrow! You've mentioned three types, all of which I found online too, but I can't be sure which one it is. I thought the little bit of yellow on the beak might give the game away, but I've seen nothing about this and perhaps the colour grows out. I guess it could be a juvenile, male or female of any of them!