In contrast to the House Sparrow, the sexes have similar plumage. Tree Sparrow Bird is slightly smaller and more compact than the House Sparrow, and generally brighter, with a red-brown crown and white cheeks that are punctuated with a prominent black cheek spot. The white extends around the neck in an almost complete collar, and it has black lores and a black chin and centre to the throat. The mantle is rufous streaked with black, the rump is brown and the underparts are pale buffy-brown and unmarked.
Tree Sparrow Bird is a widespread resident in our region, although subject to population fluctuations, and has dramatically decreased in Britain in recent years. In Europe, Tree Sparrow Bird is less frequent than the House Sparrow near human habitation (although across much of Asia it is the common sparrow in towns and cities), and can usually be found in farmland areas with tall hedgerows, woodland edges and scattered trees, parkland, and other open habitats with occasional trees. It nests in a tree hole or in cavities in buildings.
The calls and 'song' are similar to those of the House Sparrow, with a repeated cheeping and chirping, but the note has a brisker and drier quality to it and is slightly higher pitched. The song of Tree Sparrow Bird is a simple "tcheep tchirp tcheep tchirp tcheep tchirp...", varying between just one repeated note and alternating between two notes at slightly different pitches. It also has a sweeter and thinner, rather swallowed and ascending "tssu'eet", and in flight has a distinctive hard and dry "chek", repeated as "chekk-et'et'ett" and which becomes a rolling chatter when given by a flock.