House sparrows mainly eat seeds, but they also eat insects, moths, berries, and fruits when available. They feed insects to their young babies to help them grow up strong. When it comes to construction, these birds are efficient. They build their nests low to the ground and make them of grass, twigs, and smaller plants.
The house sparrow is a very social bird. It is gregarious during all seasons when feeding, often forming flocks with other species of birds. It roosts communally while breeding nests are usually grouped together in clumps.
They play an important role in the ecosystem. Sparrows are key players in the food chain. While adults usually eat seeds and grains, they're also known to eat insects, which helps with pest control. In fact, they even helped save New York City's trees when they were being destroyed by green inch worms!
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