World Sparrow Day: Here are a few facts about the house sparrow, an endangered species

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The house sparrow is a very social bird. It is seen during all seasons. (Image: Pixabay)

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House sparrows can be kept as pets. (Image: Pixabay)

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They sleep with the bill tucked underneath the scapular feathers. (Image: Pixabay)

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They are found in New Zealand, Australia, North America, India and Europe. (Image: Unsplash)

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The sparrows' habitat covers two-third of land masses. (Image: Pixabay)

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Sparrows can swim underwater for survival. (Image: Pixabay)

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The birds build their nests in the eaves and other crevices of houses. Holes in cliffs and banks, or tree hollows, are also used. (Image: Pixabay)

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Over 40 percent adult sparrows die each year and 60 percent of these birds have decreased in clusters. (Image: Pixabay)

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In India, a steady decline in population since 2005 has been seen in metro cities such as Delhi, Mumbai, Chennai, Hyderabad and Bengaluru. (Image: Unsplash)

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The house sparrow is monogamous, and mates for life. (Image: Pixabay)