House Sparrow

Passer domesticus

The male House Sparrow has well-defined markings, including black eye liner and a "bib". The Northern European variety has grey on top of his head.	The female House Sparrow, like many female songbirds, is much plainer. She has a pale creamy-brown stripe leading back from her eye.
They are vocal birds constantly chattering to each other	This is a Sparrow crossed with a sheep

The interesting thing about these sparrows is that they live in central Madrid but are northern House Sparrows (with grey crowns) not Spanish Sparrows (see below)
She also lives in Madrid but is not a Spanish Sparrow	He lives in London; beak has not yet turned to adult black	Another Cockney Sparrow, this time adult male
Juvenile with telltale yellow mouth where beak begins	Father feeding the chick	Father and fledgling chick
House Sparrows are gregarious birds which have adapted to live close to humans

 Links:

Spanish/Willow Sparrow	Italian Sparrow	Tree/Eurasian Sparrow	Hedge "Sparrow"/Dunnock	Rock Sparrow/Petronia	Sparrows in major cities
Brown top of head, white eyebrow	As Spanish but less streaky	Brown head, black cheek patch	Brown/grey patterned top of head