On World Sparrow Day, a few interesting facts about the bird that was once an alarm clock

Sparrows are social birds and hence live in groups. Colonies of sparrows are commonly called flocks.

Sparrows are not generally considered as territorial creatures, but they are aggressively protective when it come to their nests.

Male and female sparrows can be easily distinguished by feather coloration. Females possess brown backs with stripes while males possess reddish backs and black bibs.

Males have the responsibility of building the nests, and during the construction phase, they attempt to attract females.

Though they are not water birds, sparrows can swim at a very fast pace when they sense danger.

Sparrows live for about 4-5 years in wild.