Mobile bird identification
Bird Field Guide
Adult male

The male House Sparrow has a grey cap, black bib, grey underside and a chestnut-brown back. It has a distinctive white wing bar and a plain brown tail.

House Sparrow

Passer domesticus
Sparrow Menu
Distribution:
Resident breeder throughout nearly all of Europe. Numbers in the UK are declining fast and it is considered a red list species. One reason suggested is lack of suitable nest sites on new and well maintained houses.
Notes:
A much loved bird by many, the House Sparrow is one of the most widely distributed birds in Europe. There are now serious concerns about dwindling numbers in the UK and it is classified as a red list species.
Habitat:
As it's name suggests the House Sparrow lives alongside people, nesting mostly in gaps in the eaves of houses and buildings.
Order: Passeriformes

Family: Passeridae

Genus:  Passer

Species: P. domesticus
Flock of male and female House Sparrows
Further reading...
A fascinating book exploring the relationship between man and sparrow.
Adult Female
Thanks to:http://www.piqs.de/user/Adamo/ (Modified)
The female House Sparrow lacks the black bib and chestnut head markings of the male, she is overall much duller and plainer.
Thanks to:http://commons.wikimedia.org/wiki/User:Tony_Wills (Modified)
Note the faint eye stripe and wing bar on this female.
Identification of male House Sparrow
Chestnut-brown stripe on head and neck
Black bib and face
Grey cap
Grey underside
Identification female House Sparrow
Pale eye stripe
Grey underside
Plain brown back with black streaks
Yellow-brown cap and head
Adult female House Sparrow
Adult male House Sparrow
Note the black bib and chestnut-brown stripe on the head and neck, in winter these marks are usually less pronounced.
Male House Sparrow flying
Female House Sparrow flying