Sparrows are disappearing, not due to extinction, but because we are eliminating their habitats. These small birds rely on gaps in walls, old roof tiles, and structures in human-built environments to nest. As buildings are renovated for energy efficiency—sealing cracks and adding solar panels—sparrows lose their homes. They struggle to find a nesting site and, eventually, stop breeding, causing their colonies to dwindle. Unlike forest birds like tits, sparrows are building-dependent. Their world