Eurasian tree sparrow 
(Sẻ, 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 name Passer is the Latin word for "sparrow", coming from a root word referring to speed.
The Eurasian tree sparrow's binomial name is derived from two Latin words: passer, "sparrow", and montanus, "of the mountains" (from mons "mountain").
The Eurasian tree sparrow's common name is given because it prefers tree holes for nesting.