We all are familiar with the concept of introverted and extroverted personality types. Introverts are those people who do not enjoy the company of plenty of multitudes. On the other hand, extroverted people enjoy being social butterflies.

What if I tell you that this phenomenon is not exclusively found in humans rather it's quite common among birds specifically sparrows? Birds can also have tendencies like human. Lets find out.

Why sparrows?

This small bird is sometimes called a house sparrow. They are seed eaters. They are regarded as social birds, they engage in creating flocks with other species of birdies. They also engage in social stirs such as dust or water bathing even a startling social singing.

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The new study

The new study was published in Ecological behaviour and conducted by imperial college London. The study establishes the relationship between friendship and breeding. Those sparrows' own more contrasting sex friends in the off-season will excel at breeding during the breed season.

Although if we focus on the long-term assessment, another striking detail is there,  those birds have advantage over, not extremely friendly but friendly enough have more or less average number of opposite gender mates over those who are not socially active or extremely active..

The major author of the research from London imperial college from the department of life sciences established the fact that birds who have more opposite-sex mates are likely to have a high rate of breeding. Although the birds social stability or connections could vary throughout their lifetime. Sometimes more connections sometimes less. Those sparrows who have an average quantity of friends compared to those at extremely very high, or very low, are more likely to stay fit. An extremely intriguing thing we can deduce from this study-socialization and sociality is an extremely important factors in evolution.

This study was executed on Lundy island in Bristol. This place was a great place to research as it's a closed island meaning the birds here, do not leave the premise, and no birds from outside come here, Which was an ideal situation for researchers to get the data they were looking for. This situation of the closed island helped the researchers to understand the genetics of birds, their family tree, and their genealogy.

The fitness of birds is also measured here, fitness does not mean physical. We are talking about a process where genetic information passes from one to the next generation.

The investigation of fitness involves two procedures first recruits where we estimate how many birds go to chicks and mate, produce their own offspring.

Second is de-lifing where we remove certain birds and their subsequent generation of progeny to see population growth.

To sum up, we can say that having an average mate of the opposite sex can help to pass the gene and maintain the fitness of Sparrows. Friendliness can be increased and decreased throughout the life span of sparrows. Here the researcher established two facts that sociability is compulsory for evolution although it should be average, not extreme.