Have the sparrows extincted already?

There are about 27 species of true eurasian sparrows, and another 60 or so species of new world birds also called sparrows though not closely related. But, I expect you are refering to the House Sparrow (Passer domesticus). read more

The population is estimated at 540 million worldwide, though that population has declined significantly. (See House Sparrow). You don’t need to worry sabout them going extinct any time soon. House sparrows are highly adaptable and also very aggressive. read more

House Sparrows are cavity nesters, which means they'll build their nests in basically any crevice they can find. New styles of architecture, especially in emerging economies, however, have fewer cavities for them to nest in. Development is decreasing natural nesting sites. read more

The House sparrow and its subspecies are worldwide in their distribution, except in the polar regions. Sparrows have had a symbiotic relationship with humans for the past 10,000 years. Poets have sung of their trust and love for each other in all languages. read more