Eurasian Tree Sparrow (Passer montanus)
The Eurasian Tree Sparrow (Passer montanus) is a passerine bird in the sparrow family with a rich chestnut crown and nape, and a black patch on each pure white cheek. The sexes are similarly plumaged, and young birds are a duller version of the adult. This sparrow breeds over most of temperate Eurasia and Southeast Asia.
The Eurasian Tree Sparrow's untidy nest is built in a natural cavity, a hole in a building or the large nest of a European Magpie or White Stork. The typical clutch is five or six eggs which hatch in under two weeks. This sparrow feeds mainly on seeds, but invertebrates are also consumed, particularly during the breeding season.
Source: en.wikipedia.org/wiki/Eurasian_Tree_Sparrow - 08.02.2014
Speaking of Birdbrain *
"It is true that there are quite a lot of us. Our song is loud, and not very appealing. People think we eat their crops. Even our humble appearance doesn’t earn us any admirers. But still, if you take the trouble to pay attention to a cheeky sparrow, you’ll find it worthwhile. I promise you that.
You think you won’t find anything special about me, do you? Well, there are just as many of us as there are of you. And you think that just because there are lots of something, that makes it irrelevant? Then you would have to be pretty unimportant yourself! Oh, excuse me, I was being really impertinent.
Actually, I am a well-mannered field sparrow. I wouldn’t want you to confuse me with my cousin, the fat and cheeky house sparrow. You can recognise me by my grey breast and the black patch on my wing, so you can easily tell us apart. As my name suggests, I tend to keep away from your houses.
* quotes from the book "If Animals Could Talk"