Definition
The Eurasian tree sparrow, *Passer montanus*, is a small bird in the sparrow family. It's adaptable and found across Eurasia, often near human habitats. Similar to the house sparrow, it's smaller with a chestnut crown and black patch on its cheeks. Think of it as the house sparrow's slightly more stylish cousin. π It is a social bird, often seen in flocks, especially during migration. Its diet consists mainly of seeds and grains, but it also eats insects, particularly during breeding season. Conservation efforts focus on maintaining its habitat, as populations have declined in some areas.