The Secret Life of Sparrows: Small Birds, Big Lessons

Sparrows are part of the family passeridae and are the most well-known birds that live around human dwellings. Scientists say these extraordinary creatures defy evolution. Sparrows can be found everywhere in the world, being extremely adaptable. They like to live close to human dwellings, building their nests on buildings, roofs and houses.
There are many species of sparrows in the world, such as the Eurasian tree sparrow, house sparrow, Spanish sparrow or the rock sparrow. Other types of sparrows are the white sparrow, blue sparrow, the java sparrow or lark sparrow.

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The heart of a sparrow is so efficient it can beat 760 times per minute. Its digestive system is very short, with very concentrated gastric acid.
Sparrows have a size between 10 and 20 cm, depending on the species. Males have reddish backs and a black bib, while females have brown backs with stripes.
Sparrows can live between four and five years in the wild, however some sparrow species can live for as long as 12 years. The oldest sparrow recorded is known to have lived for 15 years and 9 months.

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